RHSA-2026:33866

Vulnerability from csaf_redhat - Published: 2026-06-30 22:56 - Updated: 2026-07-03 21:35
Summary
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Severity
Important
Notes
Topic: An update for Red Hat Hardened Images RPMs is now available.
Details: This update includes the following RPMs: nodejs26: * nodejs26-26.4.0-1.3.hum1 (aarch64, x86_64) * nodejs26-bin-26.4.0-1.3.hum1 (noarch) * nodejs26-devel-26.4.0-1.3.hum1 (aarch64, x86_64) * nodejs26-docs-26.4.0-1.3.hum1 (noarch) * nodejs26-full-i18n-26.4.0-1.3.hum1 (aarch64, x86_64) * nodejs26-libs-26.4.0-1.3.hum1 (aarch64, x86_64) * nodejs26-npm-11.17.0-1.26.4.0.1.3.hum1 (noarch) * nodejs26-npm-bin-26.4.0-1.3.hum1 (noarch) * v8-14.6-devel-14.6.202.34-1.26.4.0.1.3.hum1 (aarch64, x86_64) * nodejs26-26.4.0-1.3.hum1.src (src) Security Fix(es): nodejs26: * CVE-2026-13149
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.
CVE-2026-13149

A flaw was found in brace-expansion. An attacker can exploit a vulnerability in the `expand()` function by providing a specially crafted string. This string, containing consecutive non-expanding brace groups, can trigger exponential-time complexity, leading to significant CPU consumption and event-loop blocking. This can result in a Denial of Service (DoS) for the affected system.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1333 - Inefficient Regular Expression Complexity
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:nodejs26-main@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:nodejs26-main@noarch —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:nodejs26-main@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:nodejs26-main@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-48936

A flaw was found in Node.js. The Node.js Permission API can allow a local server to be started through a Unix domain socket, even when the `--allow-net` permission is not explicitly granted. This bypasses intended security restrictions, potentially leading to unintended local network exposure or integrity impact.

3.3 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
CWE-648 - Incorrect Use of Privileged APIs
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:nodejs26-main@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:nodejs26-main@noarch —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:nodejs26-main@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:nodejs26-main@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Low
CVE-2026-53550

A flaw was found in js-yaml, a JavaScript YAML parser and dumper. A remote attacker can exploit this vulnerability by providing a specially crafted YAML document that repeatedly uses the same alias in a merge sequence. This can lead to algorithmic CPU exhaustion, causing the Node.js worker or event loop to be blocked for an extended period, resulting in a denial of service (DoS) for the affected system.

5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE-1333 - Inefficient Regular Expression Complexity
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Hardened Images:nodejs26-main@aarch64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:nodejs26-main@noarch —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:nodejs26-main@src —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Hardened Images:nodejs26-main@x86_64 —
Vendor Fix fix
Workaround
Threats
Impact Moderate
References
To clipboard 

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            "attackVector": "NETWORK",
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            "baseScore": 7.5,
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            "privilegesRequired": "NONE",
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          "title": "Vulnerability description"
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      "scores": [
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            "privilegesRequired": "LOW",
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        }
      ],
      "title": "nodejs: Node.js: Local server can be started without network permission via Permission API flaw"
    },
    {
      "cve": "CVE-2026-53550",
      "cwe": {
        "id": "CWE-1333",
        "name": "Inefficient Regular Expression Complexity"
      },
      "discovery_date": "2026-06-22T16:01:01.300830+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2491401"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in js-yaml, a JavaScript YAML parser and dumper. A remote attacker can exploit this vulnerability by providing a specially crafted YAML document that repeatedly uses the same alias in a merge sequence. This can lead to algorithmic CPU exhaustion, causing the Node.js worker or event loop to be blocked for an extended period, resulting in a denial of service (DoS) for the affected system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "js-yaml: js-yaml: Denial of Service via crafted YAML merge keys",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this flaw as Moderate impact, consistent with the upstream CVEORG assessment. The vulnerability causes CPU exhaustion via quadratic merge-key processing in js-yaml\u0027s YAML parser. In Red Hat products, all confirmed vulnerable code paths run client-side in the browser (OpenShift Console plugins, Kiali frontend, monitoring dashboard editors). A denial of service is limited to freezing the user\u0027s own browser tab when processing crafted YAML input, not server-side resource exhaustion. The user can recover by closing the tab.",
          "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:nodejs26-main@aarch64",
          "Red Hat Hardened Images:nodejs26-main@noarch",
          "Red Hat Hardened Images:nodejs26-main@src",
          "Red Hat Hardened Images:nodejs26-main@x86_64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-53550"
        },
        {
          "category": "external",
          "summary": "RHBZ#2491401",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491401"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-53550",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-53550"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-53550",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53550"
        },
        {
          "category": "external",
          "summary": "https://github.com/nodeca/js-yaml/security/advisories/GHSA-h67p-54hq-rp68",
          "url": "https://github.com/nodeca/js-yaml/security/advisories/GHSA-h67p-54hq-rp68"
        }
      ],
      "release_date": "2026-06-22T14:59:14.906000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-30T22:56:15+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:nodejs26-main@aarch64",
            "Red Hat Hardened Images:nodejs26-main@noarch",
            "Red Hat Hardened Images:nodejs26-main@src",
            "Red Hat Hardened Images:nodejs26-main@x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:33866"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.",
          "product_ids": [
            "Red Hat Hardened Images:nodejs26-main@aarch64",
            "Red Hat Hardened Images:nodejs26-main@noarch",
            "Red Hat Hardened Images:nodejs26-main@src",
            "Red Hat Hardened Images:nodejs26-main@x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "Red Hat Hardened Images:nodejs26-main@aarch64",
            "Red Hat Hardened Images:nodejs26-main@noarch",
            "Red Hat Hardened Images:nodejs26-main@src",
            "Red Hat Hardened Images:nodejs26-main@x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "js-yaml: js-yaml: Denial of Service via crafted YAML merge keys"
    }
  ]
}


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Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.