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High RHSA-2026:66605 4 CVEs

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Published Sep 12, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 8

ReleasePackageFixed in
Red Hat · Hardened Images 1 hummingbird:1 nodejs26 1:26.8.2-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 nodejs26-bin 1:26.8.2-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 nodejs26-devel 1:26.8.2-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 nodejs26-docs 1:26.8.2-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 nodejs26-full-i18n 1:26.8.2-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 nodejs26-libs 1:26.8.2-0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 nodejs26-npm 1:11.19.1-1.26.8.2.0.1.hum1
Red Hat · Hardened Images 1 hummingbird:1 nodejs26-npm-bin 1:26.8.2-0.1.hum1

Vulnerabilities 4

  • High 7.5
    CVE-2026-19534

    undici vulnerable to Denial of Service via unrequested WebSocket subprotocol

    undici's WebSocket client crashes the whole Node.js process during the opening handshake when a server responds with a subprotocol that the client never requested. A default WebSocket connection sends no subprotocol, but if the server's 101 response includes …

    undici undici renovate prism Debian Ubuntu Wolfi npm
  • High 7.4
    CVE-2026-84961

    undici vulnerable to TLS certificate validation bypass via dropped connect options in BalancedPool

    undici's BalancedPool constructor passes its entire options object through an internal deep-clone that serializes and reparses the value as JSON. Because JSON cannot represent functions, any function-valued TLS option, such as a caller-supplied checkServerIde…

    undici undici prism lerna Debian Ubuntu Wolfi npm
  • Medium 5.9
    CVE-2026-85024

    undici vulnerable to Denial of Service via unhandled error in WebSocket permessage-deflate decompression

    undici bundles a WebSocket client whose permessage-deflate size-limit cleanup removes all listeners from the internal zlib inflate stream, including its error listener, while that stream can still emit. When a remote peer sends a compressed payload that cross…

    undici undici renovate prism Debian Ubuntu Wolfi npm
  • Low 3.7
    CVE-2026-18540

    undici vulnerable to downstream response splitting via retry interceptor

    undici's retry interceptor can append the body of a ranged retry response to bytes already delivered from an earlier partial response while still presenting the original response's status and headers. This happens when an upstream server delivers part of a bo…

    undici undici renovate prism Debian Ubuntu Azure Linux Wolfi npm

References

  • article
    https://images.redhat.com/
  • report
    https://access.redhat.com/security/cve/CVE-2026-84961
  • article
    https://access.redhat.com/security/updates/classification/
  • report
    https://access.redhat.com/security/cve/CVE-2026-19534
  • report
    https://access.redhat.com/security/cve/CVE-2026-18540
  • report
    https://access.redhat.com/security/cve/CVE-2026-85024
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_66605.json
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2528783
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-18540
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-18540
  • article
    https://cna.openjsf.org/security-advisories.html
  • article
    https://github.com/nodejs/undici/security/advisories/GHSA-r53p-7pc4-xj5r
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2528759
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-19534
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-19534
  • article
    https://github.com/nodejs/undici/security/advisories/GHSA-rfgv-xxqx-mfg5
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2528735
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-84961
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-84961
  • article
    https://github.com/nodejs/undici/security/advisories/GHSA-w293-vg96-wgc3
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2528707
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-85024
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-85024
  • article
    https://github.com/nodejs/undici/security/advisories/GHSA-3wwx-pv8p-q78v