MediumCVE-2026-88057

    Angular: Cross-site Scripting (CVE-2026-88057)

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

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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 20.3.28, 21.2.20, and 22.1.0, Angular's compiler and runtime in @angular/core and @angular/compiler could omit or select an incorrect sanitizer for security-sensitive directive host bindings because SecurityContext was derived from the declaring directive or component selector rather than the concrete host element.

    Update angular to version 20.3.28, Angular compiler to version 22.1.0, Angular core to version 21.2.20.

    Affected
    • Angular gte 20.0.0, < 20.3.28..*
    • Angular lte *..19.2.25

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

    Metrics

    6.1

    Priority

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

    Source: NVD, CVSS v3

    6.1

    CVSS v3

    Severity Medium on the scale from 0 to 10.

    Source: BSI, OSV, CVE.org, Hersteller

    0.4 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 31.4

    Show all metrics
    Severity
    Medium
    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
    63.69 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
    6.1 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
    6.1
    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
    5.3
    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
    0.4 %
    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
    31.4
    Elevated — this CVE ranks above at least 10% of all CVEs scored today.
    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 · automatable · Technical impact: partial
    Source: CISA Vulnrichment, as of 11 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-79

    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
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    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 20.3.28, 21.2.20, and 22.1.0, Angular's compiler and runtime in @angular/core and @angular/compiler could omit or select an incorrect sanitizer for security-sensitive directive host bindings because SecurityContext was derived from the declaring directive or component selector rather than the concrete host element. The mismatch is reachable through hostDirectives composition, inherited HostBinding declarations, createComponent with a custom hostElement or dynamic directives, SVG/MathML namespace elements, and tag-neutral selectors such as :not(...). Attacker-controlled href, src, action, xlink:href, or data values can therefore reach DOM attributes without Angular's built-in sanitizer and execute arbitrary JavaScript in the user's browser context. Applications unable to upgrade can use DomSanitizer.sanitize with SecurityContext.URL before assignment or restrict inputs to validated HTTP and HTTPS URL schemes. This issue is fixed in versions 20.3.28, 21.2.20, and 22.1.0.

    Source: BSI CSAF, BSI WID Portal, OSV (Open Source Vulnerabilities), NVD (NIST), cvelistv5, GitHub Security Advisories

    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
    • ≥ 20.0.0, < 20.3.28
    • ≤ 19.2.25
    • 20.0.0 – < 20.3.28
    • 22.0.0 – < 22.1.0
    • 19.0.0 – ≤ 19.2.25
    • 21.0.0 – < 21.2.20
    • —
    • —
    • 20.3.28
    • 22.1.0
    • —
    • 21.2.20
    Open SourceAngular compiler
    • < 22.1.0
    • < 20.3.28
    • < 21.2.20
    • 22.1.0
    • 20.3.28
    • 21.2.20
    Open SourceAngular core
    • < 21.2.20
    • < 20.3.28
    • < 22.1.0
    • 21.2.20
    • 20.3.28
    • 22.1.0
    Open SourceAngular platform-server
    • < 20.3.30
    • 20.3.30

    Vendors and products

    Weakness classes (CWE)

    • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

      Base

      The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

      Entry at MITRE CWE-79

    References & sources

    • github.comangular/angular/security/advisories/GHSA-hh8m-fm6v-7cvgx_refsource_CONFIRM
    • github.comangular/angular/issues/69550x_refsource_MISC
    • github.comangular/angular/pull/69558x_refsource_MISC
    • github.comangular/angular/commit/2f96c8020f85ccb715a76de4b79a0c680c2c7264x_refsource_MISC
    • github.comangular/angular/commit/6afe6fa781c2f0931f0aedd729b9884a8fe212eex_refsource_MISC
    • github.comangular/angular/commit/6caa298dee58319b2d674dc91364e26ffe3ecb2bx_refsource_MISC
    • github.comangular/angular/releases/tag/v20.3.28x_refsource_MISC
    • github.comangular/angular/releases/tag/v21.2.20x_refsource_MISC
    • github.comangular/angular/releases/tag/v22.1.0x_refsource_MISC
    • 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 20.3.28; 21.0.0 – before 21.2.20; 22.0.0 – before 22.1.0)

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

      Show 11 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      CVSSadded
      —
      AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/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) 20.3.28 *cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* versions from (including) 21.0.0 up to (excluding) 21.2.20 *cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* versions from (including) 22.0.0 up to (excluding) 22.1.0
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/commit/2f96c8020f85ccb715a76de4b79a0c680c2c7264 Types: Patch
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/commit/6afe6fa781c2f0931f0aedd729b9884a8fe212ee Types: Patch
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/commit/6caa298dee58319b2d674dc91364e26ffe3ecb2b Types: Patch
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/issues/69550 Types: Issue Tracking, Patch
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/pull/69558 Types: Issue Tracking, Patch
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/releases/tag/v20.3.28 Types: Release Notes
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/releases/tag/v21.2.20 Types: Release Notes
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/releases/tag/v22.1.0 Types: Release Notes
      Reference typeadded
      —
      GitHub, Inc.: https://github.com/angular/angular/security/advisories/GHSA-hh8m-fm6v-7cvg Types: Exploit, Vendor Advisory

      Source identifier: nvd@nist.gov

    2. Record modifiedCISA ADP

      CISA assessment (SSVC): exploitation: none known, automatable: yes

      Show the original change
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      SSVC assessmentadded
      —
      {"id":"CVE-2026-88057","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-09-11T16:34:33.902581Z"}

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

    3. ReceivedGitHub

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

      Weakness type: CWE-79

      Description added or changed

      Show 13 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 20.3.28, 21.2.20, and 22.1.0, Angular's compiler and runtime in @angular/core and @angular/compiler could omit or select an incorrect sanitizer for security-sensitive directive host bindings because SecurityContext was derived from the declaring directive or component selector rather than the concrete host element. The mismatch is reachable through hostDirectives composition, inherited HostBinding declarations, createComponent with a custom hostElement or dynamic directives, SVG/MathML namespace elements, and tag-neutral selectors such as :not(...). Attacker-controlled href, src, action, xlink:href, or data values can therefore reach DOM attributes without Angular's built-in sanitizer and execute arbitrary JavaScript in the user's browser context. Applications unable to upgrade can use DomSanitizer.sanitize with SecurityContext.URL before assignment or restrict inputs to validated HTTP and HTTPS URL schemes. This issue is fixed in versions 20.3.28, 21.2.20, and 22.1.0.
      CVSSadded
      —
      AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/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-79
      Affected versions (publisher)added
      —
      New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/88xxx/CVE-2026-88057.json">CVE-2026-88057</a>
      Referenceadded
      —
      https://github.com/angular/angular/commit/2f96c8020f85ccb715a76de4b79a0c680c2c7264
      Referenceadded
      —
      https://github.com/angular/angular/commit/6afe6fa781c2f0931f0aedd729b9884a8fe212ee
      Referenceadded
      —
      https://github.com/angular/angular/commit/6caa298dee58319b2d674dc91364e26ffe3ecb2b
      Referenceadded
      —
      https://github.com/angular/angular/issues/69550
      Referenceadded
      —
      https://github.com/angular/angular/pull/69558
      Referenceadded
      —
      https://github.com/angular/angular/releases/tag/v20.3.28
      Referenceadded
      —
      https://github.com/angular/angular/releases/tag/v21.2.20
      Referenceadded
      —
      https://github.com/angular/angular/releases/tag/v22.1.0
      Referenceadded
      —
      https://github.com/angular/angular/security/advisories/GHSA-hh8m-fm6v-7cvg

      Source identifier: security-advisories@github.com

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