HighCVE-2026-57281

    Jenkins Active Directory Plugin: Improper Neutralization of CRLF Sequences ('CRLF Injection') (CVE-2026-57281)

    Published Last modified Sources: BSI

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    What is affected, what to do

    A flaw was found in the Jenkins Script Security Plugin. Attackers with the ability to run sandboxed Groovy scripts can exploit this vulnerability to execute arbitrary code outside the sandbox environment.

    Update Jenkins MCP Server Plugin to version 0.172.174.v9f72da_90a_710, active_directory to version 2.41.2, bitbucket_push_and_pull_request to version 3.3.9.

    Affected
    • Jenkins Script Security Plugin lte *..1402.v94c9ce464861

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    7.5

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    7.5

    CVSS v3

    Severity High on the scale from 0 to 10.

    Source: BSI

    0.9 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 60.6

    Show all metrics
    Severity
    High
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    48.75 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    7.5 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    7.5
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.9 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    60.6
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · not automatable · Technical impact: total
    Source: CISA Vulnrichment, as of 24 June 2026
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-93, CWE-693, CWE-917

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    A flaw was found in the Jenkins Script Security Plugin. Attackers with the ability to run sandboxed Groovy scripts can exploit this vulnerability to execute arbitrary code outside the sandbox environment. This is due to the plugin's failure to reject Groovy Abstract Syntax Tree (AST) transformation annotations that include an extensions member, allowing unauthorized script execution if a suitable script exists on the classpath.

    Source: BSI WID Portal

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    Jenkins ProjectJenkins Active Directory Plugin
    • ≤ 2.41.1
    • —
    Jenkins ProjectJenkins Assembla Plugin
    • ≤ 1.4
    • —
    Jenkins ProjectJenkins Bitbucket Push and Pull Request Plugin
    • ≤ 3.3.8
    • —
    Jenkins ProjectJenkins Contrast Continuous Application Security Plugin
    • ≤ 3.11
    • —
    Jenkins ProjectJenkins EC2 Fleet Plugin
    • ≤ 4.2.3.539.v8fedff2a_81c3
    • —
    Jenkins ProjectJenkins External Workspace Manager Plugin
    • ≤ 1.3.2
    • —
    Jenkins ProjectJenkins FitNesse Plugin
    • 1.36
    • —
    Jenkins ProjectJenkins Git client Plugin
    • ≤ 6.6.0
    • —
    Jenkins ProjectJenkins Git Parameter Plugin
    • —
    • —
    Jenkins ProjectJenkins Gitee Plugin
    • —
    • —
    Jenkins ProjectJenkins GitHub Branch Source Plugin
    • ≤ 1967.1969.v205fd594c821
    • —
    Jenkins ProjectJenkins Job Configuration History Plugin
    • —
    • —
    Jenkins ProjectJenkins MCP Server Plugin
    • < 0.172.174.v9f72da_90a_710
    • 0.172.174.v9f72da_90a_710
    Jenkins ProjectJenkins OWASP ZAP Plugin
    • ≤ 1.0.7
    • —
    Jenkins ProjectJenkins Pipeline: Groovy Plugin
    • ≤ 4331.v9d06ed4658ff
    • —
    Jenkins ProjectJenkins Priority Sorter Plugin
    • ≤ 936.v2c01c6b_84449
    • —
    Jenkins ProjectJenkins Script Security Plugin
    • ≤ 1402.v94c9ce464861
    • —
    Jenkins ProjectJenkins Zowe zDevOps Plugin
    • ≤ 1.1.3.50.ve350c9b_450b_1
    • —
    jenkinsactive_directory
    • < 2.41.2
    • 2.41.2
    jenkinsassembla
    • ≤ 1.4
    • —
    jenkinsbitbucket_push_and_pull_request
    • < 3.3.9
    • 3.3.9
    jenkinscontrast_continuous_application_security
    • ≤ 3.11
    • —
    jenkinsec2_fleet
    • ≤ 4.2.3.539.v8fedff2a_81c3
    • —
    jenkinsfitnesse
    • ≤ 1.36
    • —
    jenkinsgit_client
    • < 6.6.1
    • 6.6.1
    jenkinsgit_parameter
    • ≤ 462.vdcf3df2ed2ca
    • —
    jenkinsgithub_branch_source
    • ≤ 1967.1969.v205fd594c821
    • —
    jenkinsjob_configuration_history
    • ≤ 1356.ve360da_6c523a
    • —
    jenkinsmcp_server
    • ≤ 0.177.v629fdb_2557fe
    • —
    jenkinsofficial_owasp_zap
    • ≤ 1.0.7
    • —
    jenkinspipeline\
    • ≤ 4331.v9d06ed4658ff
    • —
    jenkinspriority_sorter
    • ≤ 936.v2c01c6b_84449
    • —
    jenkinsscript_security
    • ≤ 1402.v94c9ce464861
    • —
    jenkinszowe_zdevops
    • ≤ 1.1.3.50.ve350c9b_450b_1
    • —
    JenkinsJenkins
    • Assembla Plugin
    • FitNesse Plugin
    • OWASP ZAP Plugin
    • Zowe zDevOps Plugin
    • —
    • —
    • —
    • —
    JenkinsJenkins Active Directory Plugin
    • < 2.41.2
    • 2.41.2
    JenkinsJenkins Bitbucket Push and Pull Request Plugin
    • < 3.3.9
    • 3.3.9
    JenkinsJenkins Contrast Continuous Application Security Plugin
    • < 3.12
    • 3.12
    JenkinsJenkins EC2 Fleet Plugin
    • < 4.2.3.540.va_6eedb_7b_c112
    • 4.2.3.540.va_6eedb_7b_c112
    JenkinsJenkins External Workspace Manager Plugin
    • < 1.4.0
    • 1.4.0
    JenkinsJenkins Git client Plugin
    • < 6.6.1
    • 6.6.1
    JenkinsJenkins Git Parameter Plugin
    • < 462.463.v496a_59f698e5
    • 462.463.v496a_59f698e5
    JenkinsJenkins Gitee Plugin
    • < 1292.v2559f2f3f2c0
    • 1292.v2559f2f3f2c0
    JenkinsJenkins GitHub Branch Source Plugin
    • < 1967.1970.vd86979736546
    • 1967.1970.vd86979736546
    JenkinsJenkins Job Configuration History Plugin
    • < 1367.vc8fa_b_15101dc
    • 1367.vc8fa_b_15101dc

    Vendors and products

    Weakness classes (CWE)

    • CWE-93Improper Neutralization of CRLF Sequences ('CRLF Injection')

      Base

      The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

      Entry at MITRE CWE-93

    • CWE-693Protection Mechanism Failure

      Pillar

      The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

      Entry at MITRE CWE-693

    • CWE-917Improper Neutralization of Special Elements used in an Expression Language Statement ('Expression Language Injection')

      Base

      The product constructs all or part of an expression language (EL) statement in a framework such as a Java Server Page (JSP) using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended EL statement before it is executed.

      Entry at MITRE CWE-917

    References & sources

    • jenkins.ioJenkins Security Advisory 2026-06-24Vendor advisory, Vendor advisory
    • NVD (NIST)vuln/detail/CVE-2026-57287advisory
    • github.comjenkinsci/job-config-history-plugin/commit/c8fab15101dce336a8f1…web
    • github.comjenkinsci/job-config-history-pluginpackage
    • github.comjenkinsci/job-config-history-plugin/releases/tag/1367.vc8fa_b_1…web
    • jenkins.ioJenkins Security Advisory 2026-06-24Vendor advisory, Vendor advisory
    • NVD (NIST)vuln/detail/CVE-2026-57303advisory
    • github.comlucamilanesio/assembla-jenkins-pluginpackage
    • jenkins.ioJenkins Security Advisory 2026-06-24Vendor advisory, Vendor advisory
    • NVD (NIST)vuln/detail/CVE-2026-57307advisory
    • github.comjenkinsci/zdevops-pluginpackage
    • jenkins.ioJenkins Security Advisory 2026-06-24Vendor advisory
    • NVD (NIST)vuln/detail/CVE-2026-57291advisory
    • github.comjenkinsci/gitee-plugin/pull/199web
    • github.comjenkinsci/gitee-plugin/commit/2559f2f3f2c02659d9abe5ab3d66c13ce…web
    • github.comjenkinsci/gitee-pluginpackage
    • github.comjenkinsci/gitee-plugin/releases/tag/1292.v2559f2f3f2c0web
    • jenkins.ioJenkins Security Advisory 2026-06-24Vendor advisory, Vendor advisory
    • NVD (NIST)vuln/detail/CVE-2026-57295advisory
    • github.comjenkinsci/ec2-fleet-plugin/pull/531web

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedRed Hat ADP

      Show 5 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/57xxx/CVE-2026-57281.json">CVE-2026-57281</a>
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:60248
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:60249
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:60252
      Referenceadded
      —
      https://access.redhat.com/errata/RHSA-2026:60256

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    2. Record modifiedCISA ADP

      CVSS V3.1: AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

      CISA assessment (SSVC): exploitation: none known, automatable: no

      Weakness type: CWE-693, CWE-93

      Show 4 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      CVSSadded
      —
      AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
      Weakness type (CWE)added
      —
      CWE-693
      Weakness type (CWE)added
      —
      CWE-93
      SSVC assessmentadded
      —
      {"id":"CVE-2026-57281","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-06-24T13:56:13.318314Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    3. Receivedgooglegroups.com

      Description added or changed

      Show 3 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Jenkins Script Security Plugin
      Descriptionadded
      —
      Jenkins Script Security Plugin 1402.v94c9ce464861 and earlier does not reject Groovy AST transformation annotations carrying an extensions member, allowing attackers able to run sandboxed Groovy scripts to execute code outside the sandbox if a suitable script is present on the classpath of the component that evaluates the script.
      Referenceadded
      —
      https://www.jenkins.io/security/advisory/2026-06-24/#SECURITY-3793

      Source identifier: jenkinsci-cert@googlegroups.com

    One NVD translation into another language is hidden.

    Linked CVEs

    Linked CVEs
    MediumCVE-2026-57307Jenkins Zowe zDevOps Plugin: Missing Authorization4.2—
    MediumCVE-2026-57306Jenkins Zowe zDevOps Plugin: Cross-Site Request Forgery (CSRF)4.2—
    MediumCVE-2026-57305Jenkins Assembla Plugin: Cross-Site Request Forgery (CSRF)5.4—
    MediumCVE-2026-57304Jenkins Assembla Plugin: Missing Authorization5.4—
    HighCVE-2026-57303Jenkins Assembla Plugin: Server-Side Request Forgery (SSRF)7.1—
    MediumCVE-2026-57302Jenkins FitNesse Plugin: Plaintext Storage of a Password4.3—
    HighCVE-2026-57301Jenkins OWASP ZAP Plugin: Externally Controlled Reference to a Resource in Another Sphere8.8—
    MediumCVE-2026-57300Jenkins MCP Server Plugin: Missing Authorization4.3—
    MediumCVE-2026-57299Jenkins Contrast Continuous Application Security Plugin: Missing Authorization4.3—
    MediumCVE-2026-57298Jenkins Contrast Continuous Application Security Plugin: Cross-Site Request Forgery (CSRF)5.4—
    MediumCVE-2026-57297Jenkins Contrast Continuous Application Security Plugin: Missing Authorization5.4—
    HighCVE-2026-57296Jenkins External Workspace Manager Plugin: Path Traversal8.8—
    MediumCVE-2026-57295Jenkins EC2 Fleet Plugin: Cross-Site Request Forgery (CSRF)5.4—
    MediumCVE-2026-57294Jenkins EC2 Fleet Plugin: Missing Authorization5.4—
    MediumCVE-2026-57293Jenkins Gitee Plugin: Missing Authorization4.3—
    MediumCVE-2026-57292Jenkins Gitee Plugin: Cross-Site Request Forgery (CSRF)5.4—
    MediumCVE-2026-57291Jenkins Gitee Plugin: Missing Authorization5.4—
    MediumCVE-2026-57290Jenkins Priority Sorter Plugin: Cross-Site Request Forgery (CSRF)4.3—
    MediumCVE-2026-57289Jenkins Bitbucket Push and Pull Request Plugin: Improper Certificate Validation4.8—
    LowCVE-2026-57288Jenkins Active Directory Plugin: LDAP Injection3.7—
    MediumCVE-2026-57287Jenkins Job Configuration History Plugin: Cleartext Storage of Sensitive Information4.3—
    MediumCVE-2026-57286Jenkins Git Parameter Plugin: Missing Authorization4.3—
    MediumCVE-2026-57285Jenkins GitHub Branch Source Plugin: Missing Authorization4.3—
    MediumCVE-2026-57284Jenkins Pipeline: Unsafe Reflection4.3—
    Show 4 more CVEs
    Linked CVEs
    MediumCVE-2026-57283Jenkins Pipeline: Cross-Site Request Forgery (CSRF)4.3—
    MediumCVE-2026-57282Jenkins Git client Plugin: OS Command Injection5.0—
    HighCVE-2026-57281Jenkins Script Security Plugin: CRLF Injection7.5—
    HighCVE-2026-57280Jenkins Script Security Plugin: Protection Mechanism Failure8.8—
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    Badge preview for CVE-2026-57281
    <a href="https://intel.neosec.eu/en/cve/CVE-2026-57281"><img src="https://intel.neosec.eu/badge/cve/CVE-2026-57281.svg?lang=en" alt="CVE-2026-57281 – NEOSEC Intel" height="20"></a>