CriticalCVE-2026-88056

    Angular: SSRF and Cross-Origin Credential Disclosure via URL Resolution Discrepancy in SSR (CVE-2026-88056)

    Published Last modified Sources: CVE.org, OSV, Hersteller, BSI

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    What is affected, what to do

    Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.30, 21.2.22, and 22.1.4, Angular Server-Side Rendering in @angular/platform-server processes user-controlled resource or request URLs through HttpClient after application code validates them with WHATWG URL parsing.

    Update angular to version 22.1.4, Angular platform-server to version 22.1.4.

    Affected
    • Angular gte 20.0.0, < 20.3.30..*
    • Angular lte *..19.2.25

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

    Metrics

    9.1

    Priority

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

    Source: NVD, CVSS v3

    9.1

    CVSS v3

    Severity Critical on the scale from 0 to 10.

    Source: CVE.org, OSV, Hersteller, BSI

    0.5 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 45.6

    Show all metrics
    Severity
    Critical
    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
    87.85 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
    9.1 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
    9.1
    CVSS v4

    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
    8.6
    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
    0.5 %
    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
    45.6
    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: proof of concept · automatable · Technical impact: partial
    Source: CISA Vulnrichment, as of 15 September 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-918

    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

    Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.30, 21.2.22, and 22.1.4, Angular Server-Side Rendering in @angular/platform-server processes user-controlled resource or request URLs through HttpClient after application code validates them with WHATWG URL parsing. The resolveUrl and parseUrl utilities called String.prototype.trim(), which removed leading Unicode whitespace such as U+00A0 or U+FEFF after the input passed a same-origin check, converting a relative path into a protocol-relative attacker-controlled URL. In affected applications that attach sensitive server-side credentials such as Authorization headers to approved requests, relativeUrlsTransformerInterceptorFn then dispatched the request to the attacker-controlled origin, causing SSRF and credential disclosure. This issue is fixed in versions 20.3.30, 21.2.22, and 22.1.4.

    Source: NVD (NIST), cvelistv5, OSV (Open Source Vulnerabilities), GitHub Security Advisories, BSI CSAF, 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
    angularangular
    • ≤ 19.2.25
    • ≥ 20.0.0, < 20.3.30
    • 22.0.0 – < 22.1.4
    • 19.0.0 – ≤ 19.2.25
    • 20.0.0 – < 20.3.30
    • 21.0.0 – < 21.2.22
    • —
    • —
    • 22.1.4
    • —
    • 20.3.30
    • 21.2.22
    Open SourceAngular platform-server
    • < 22.1.4
    • < 20.3.30
    • < 21.2.22
    • 22.1.4
    • 20.3.30
    • 21.2.22

    Vendors and products

    Weakness classes (CWE)

    • CWE-918Server-Side Request Forgery (SSRF)

      Base

      The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

      Entry at MITRE CWE-918

    References & sources

    • github.comangular/angular/security/advisories/GHSA-f6mr-pjwc-34m4x_refsource_CONFIRM
    • github.comangular/angular/commit/3e924cc8dbbb57f23b262cb8f0d7e2bd0673034cx_refsource_MISC
    • github.comangular/angular/commit/5aa6d97deb9ef1de14e23748b7fa74f97d183132x_refsource_MISC
    • github.comangular/angular/commit/71e52d1396b9cef98652929b73e08c4cde645970x_refsource_MISC
    • github.comangular/angular/releases/tag/v20.3.30x_refsource_MISC
    • github.comangular/angular/releases/tag/v21.2.22x_refsource_MISC
    • github.comangular/angular/releases/tag/v22.1.4x_refsource_MISC
    • github.comangular/angular/commit/9339a7a2de437ed93f9cc3da7f32d0100412d599web
    • github.comangular/angularpackage

    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. Initial analysis by NVDNVD

      Newly listed as affected:
      • Angular (19.0.0 – through 19.2.25; 20.0.0 – before 20.3.30; 21.0.0 – before 21.2.22; 22.0.0 – before 22.1.4)

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

      Show 10 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      CVSSadded
      —
      AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
      Product configurationadded
      —
      OR *cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* versions from (including) 19.0.0 up to (including) 19.2.25 *cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* versions from (including) 20.0.0 up to (excluding) 20.3.30 *cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* versions from (including) 21.0.0 up to (excluding) 21.2.22 *cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* versions from (including) 22.0.0 up to (excluding) 22.1.4
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/commit/3e924cc8dbbb57f23b262cb8f0d7e2bd0673034c Types: Patch
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/commit/5aa6d97deb9ef1de14e23748b7fa74f97d183132 Types: Patch
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/commit/71e52d1396b9cef98652929b73e08c4cde645970 Types: Patch
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/releases/tag/v20.3.30 Types: Release Notes
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/releases/tag/v21.2.22 Types: Release Notes
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/releases/tag/v22.1.4 Types: Release Notes
      Reference typeadded
      —
      CISA-ADP: https://github.com/angular/angular/security/advisories/GHSA-f6mr-pjwc-34m4 Types: Exploit, Mitigation, Vendor Advisory
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/security/advisories/GHSA-f6mr-pjwc-34m4 Types: Exploit, Mitigation, Vendor Advisory

      Source identifier: nvd@nist.gov

    2. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: proof of concept, automatable: yes

      Show 2 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://github.com/angular/angular/security/advisories/GHSA-f6mr-pjwc-34m4
      SSVC assessmentadded
      —
      {"id":"CVE-2026-88056","role":"CISA Coordinator","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-09-15T14:56:19.499267Z"}

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

    3. ReceivedGitHub

      CVSS V4.0: AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

      Weakness type: CWE-918

      Description added or changed

      Show 11 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionadded
      —
      Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.30, 21.2.22, and 22.1.4, Angular Server-Side Rendering in @angular/platform-server processes user-controlled resource or request URLs through HttpClient after application code validates them with WHATWG URL parsing. The resolveUrl and parseUrl utilities called String.prototype.trim(), which removed leading Unicode whitespace such as U+00A0 or U+FEFF after the input passed a same-origin check, converting a relative path into a protocol-relative attacker-controlled URL. In affected applications that attach sensitive server-side credentials such as Authorization headers to approved requests, relativeUrlsTransformerInterceptorFn then dispatched the request to the attacker-controlled origin, causing SSRF and credential disclosure. This issue is fixed in versions 20.3.30, 21.2.22, and 22.1.4.
      CVSSadded
      —
      AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
      Weakness type (CWE)added
      —
      CWE-918
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/88xxx/CVE-2026-88056.json">CVE-2026-88056</a>
      Referenceadded
      —
      https://github.com/angular/angular/commit/3e924cc8dbbb57f23b262cb8f0d7e2bd0673034c
      Referenceadded
      —
      https://github.com/angular/angular/commit/5aa6d97deb9ef1de14e23748b7fa74f97d183132
      Referenceadded
      —
      https://github.com/angular/angular/commit/71e52d1396b9cef98652929b73e08c4cde645970
      Referenceadded
      —
      https://github.com/angular/angular/releases/tag/v20.3.30
      Referenceadded
      —
      https://github.com/angular/angular/releases/tag/v21.2.22
      Referenceadded
      —
      https://github.com/angular/angular/releases/tag/v22.1.4
      Referenceadded
      —
      https://github.com/angular/angular/security/advisories/GHSA-f6mr-pjwc-34m4

      Source identifier: security-advisories@github.com

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