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CVE-2026-111943VulnerabilityPublished

Red Hat Security Advisory: ignition security update

Affects Red Hat ignitionSource GCVE Database

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Authoritative record:CVE-2026-111943· Medium 6.8

Not known to be exploited · CVSS 6.8 Medium : upgrade Red Hat x509 to 1.27.3 or 1.26.10 when convenient.

Data as of 11 Nov 2026, 13:40 UTC

CVSS 3.1 base score
6.8Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CISA-ADPCVSS 3.16.8
Patch
Available – fixed in 1.27.3, 1.26.10
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 21 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 11 Nov 2026.

What to do

Upgrade crypto/x509 to 1.27.3 or 1.26.10.

Affected software

ProductAffectedFixed in
Go standard librarycrypto/x509Affected
  • >=1.27.0-0 <1.27.3
Fixed in
  • 1.27.3
Go standard librarycrypto/x509Affected
  • <1.26.10
Fixed in
  • 1.26.10
Gocrypto/x509pkg:golang/crypto/x509Other threatsAffected
  • <1.26.10
  • >=1.27.0-0 <1.27.3
Fixed in
  • 1.26.10
  • 1.27.3

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released an official security update for Ignition in Red Hat Enterprise Linux 9 that addresses this vulnerability. Users should apply the update as detailed in the Red Hat advisory (https://access.redhat.com/articles/11258) to remediate the issue. No additional mitigation steps are indicated beyond applying the provided update.

Description

A security update for the Ignition utility in Red Hat Enterprise Linux 9 addresses a vulnerability in the golang crypto/x509 package that could allow man-in-the-middle attacks via untrusted intermediate certificates. Ignition is used during system initialization to configure disks, files, and users based on remote or local configuration sources. The update fixes CVE-2026-111943 to prevent exploitation of this certificate validation flaw.

References

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