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RHSA-2026:10999

Vulnerability from csaf_redhat - Published: 2026-04-27 18:06 - Updated: 2026-09-06 23:51
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: ruff: * python3-ruff-0.15.11-1.hum1 (noarch) * ruff-0.15.11-1.hum1 (aarch64, x86_64) * ruff-0.15.11-1.hum1.src (src)
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

A flaw was found in Nix. Unbounded recursion in the NAR (Nix Archive) parser could lead to a stack-to-heap overflow when the parser is run on a coroutine stack. The stack is allocated without a guard page, which means that a stack overflow could overwrite memory on the heap and could allow arbitrary code execution as the Nix daemon (run as root in multi-user installations) if ASLR hardening is bypassed. This can be exploited by all users able to connect to the daemon (e.g., in Nix, this is configurable via the allowed-users setting, defaulting to all users).

CWE-674 - Uncontrolled Recursion
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:ruff-main@aarch64
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:ruff-main@noarch
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:ruff-main@src
Vendor Fix fix
Unresolved product id: Red Hat Hardened Images:ruff-main@x86_64
Vendor Fix fix
Threats
Impact Important

A flaw was found in Nix. Writing to arbitrary files can occur via "nix-prefetch-url --unpack" or "nix store prefetch-file --unpack" directory traversal.

CWE-36 - Absolute Path Traversal
Affected products
Fixed 4 products, the same list as for CVE-2026-44028
Threats
Impact Important

A flaw was found in DOMPurify, a DOM-only cross-site scripting (XSS) sanitizer. Due to the default allowance of `selectedcontent`, a remote attacker could craft a malicious payload that, after initial sanitization, could be re-cloned by browsers, leading to the execution of unsanitized markup. This could result in information disclosure.

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected products
Fixed 4 products, the same list as for CVE-2026-44028
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:10999 self
https://images.redhat.com/ external
https://access.redhat.com/security/cve/CVE-2026-44029 external
https://access.redhat.com/security/updates/classi… external
https://access.redhat.com/security/cve/CVE-2026-44028 external
https://access.redhat.com/security/cve/CVE-2026-47423 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-44028 self
https://bugzilla.redhat.com/show_bug.cgi?id=2466635 external
https://www.cve.org/CVERecord?id=CVE-2026-44028 external
https://nvd.nist.gov/vuln/detail/CVE-2026-44028 external
https://discourse.nixos.org/t/security-advisory-l… external
https://github.com/NixOS/nix/security/advisories/… external
https://www.openwall.com/lists/oss-security/2026/… external
https://www.openwall.com/lists/oss-security/2026/… external
https://access.redhat.com/security/cve/CVE-2026-44029 self
https://bugzilla.redhat.com/show_bug.cgi?id=2466634 external
https://www.cve.org/CVERecord?id=CVE-2026-44029 external
https://nvd.nist.gov/vuln/detail/CVE-2026-44029 external
https://github.com/NixOS/nix/security/advisories/… external
https://access.redhat.com/security/cve/CVE-2026-47423 self
https://bugzilla.redhat.com/show_bug.cgi?id=2500564 external
https://www.cve.org/CVERecord?id=CVE-2026-47423 external
https://nvd.nist.gov/vuln/detail/CVE-2026-47423 external
https://github.com/cure53/DOMPurify/commit/011b0c… external
https://github.com/cure53/DOMPurify/releases/tag/3.4.5 external
https://github.com/cure53/DOMPurify/security/advi… external

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        {
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          "text": "dompurify: DOMPurify: Cross-site scripting vulnerability allows information disclosure",
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        },
        {
          "category": "other",
          "text": "This is a cross-site scripting (XSS) vulnerability in DOMPurify, a sanitizer for HTML, MathML, and SVG. The flaw allows a remote attacker to bypass sanitization by crafting a malicious payload that leverages the default allowance of `selectedcontent`. This can lead to browsers re-cloning the payload and executing unsanitized markup, resulting in information disclosure. User interaction is required for exploitation.\n\n* AC was raised from Low to High because exploitation requires specific browser support for the experimental \u003cselectedcontent\u003e HTML element, which is currently only available in Chromium 148+ and WebKit 625+. Firefox and Safari are not affected, and only the single DOMPurify version 3.4.4 is vulnerable (fixed in 3.4.5), significantly narrowing the attack surface.\n* Scope was lowered from Changed to Unchanged because the XSS executes within the same origin as the consuming application with no cross-domain scope change.\n\nNo Red Hat product ships dompurify 3.4.4.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Hardened Images:ruff-main@aarch64",
          "Red Hat Hardened Images:ruff-main@noarch",
          "Red Hat Hardened Images:ruff-main@src",
          "Red Hat Hardened Images:ruff-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-47423"
        },
        {
          "category": "external",
          "summary": "RHBZ#2500564",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2500564"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-47423",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-47423"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-47423",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-47423"
        },
        {
          "category": "external",
          "summary": "https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea",
          "url": "https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea"
        },
        {
          "category": "external",
          "summary": "https://github.com/cure53/DOMPurify/releases/tag/3.4.5",
          "url": "https://github.com/cure53/DOMPurify/releases/tag/3.4.5"
        },
        {
          "category": "external",
          "summary": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx",
          "url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx"
        }
      ],
      "release_date": "2026-07-14T19:56:02.057000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-04-27T18:06:57+00:00",
          "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\nhttps://images.redhat.com/",
          "product_ids": [
            "Red Hat Hardened Images:ruff-main@aarch64",
            "Red Hat Hardened Images:ruff-main@noarch",
            "Red Hat Hardened Images:ruff-main@src",
            "Red Hat Hardened Images:ruff-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:10999"
        },
        {
          "category": "workaround",
          "details": "There is no direct mitigation for this flaw other than updating the DOMPurify library when upstream patches are available. As a defense-in-depth measure, Content Security Policy (CSP) headers that restrict inline script execution can help reduce the impact of XSS vulnerabilities.\nThis issue is fixed in version 3.4.5.",
          "product_ids": [
            "Red Hat Hardened Images:ruff-main@aarch64",
            "Red Hat Hardened Images:ruff-main@noarch",
            "Red Hat Hardened Images:ruff-main@src",
            "Red Hat Hardened Images:ruff-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:ruff-main@aarch64",
            "Red Hat Hardened Images:ruff-main@noarch",
            "Red Hat Hardened Images:ruff-main@src",
            "Red Hat Hardened Images:ruff-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "dompurify: DOMPurify: Cross-site scripting vulnerability allows information disclosure"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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