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CVE-2026-42504VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat OpenShift GitOps v1.20.7 security update

Affects Red HatSource GCVE Database

0
Authoritative record:CVE-2026-42504· High 7.5

Not known to be exploited · CVSS 7.5 High : upgrade Red Hat mime to 1.26.4 or 1.25.11 soon.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 46% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.26.4, 1.25.11
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 2 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: 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 26 Oct 2026.

What to do

Upgrade mime to 1.26.4 or 1.25.11.

Affected software

ProductAffectedFixed in
Go standard librarymimeAffected
  • >=1.26.0-0 <1.26.4
Fixed in
  • 1.26.4
Go standard librarymimeAffected
  • <1.25.11
Fixed in
  • 1.25.11
Gomimepkg:golang/mimeOther threatsAffected
  • <1.25.11
  • >=1.26.0-0 <1.26.4
Fixed in
  • 1.25.11
  • 1.26.4

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

AI-suggested

Apply the Red Hat OpenShift GitOps v1.20.7 update as provided in the Red Hat advisory RHSA-2026:63141. Ensure all previously released errata relevant to your system are applied before updating. Follow Red Hat's official update procedures documented at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated.

Description

Red Hat has released a security update for Red Hat OpenShift GitOps version 1.20.7 addressing multiple bug fixes and enhancements. The update resolves issues related to Argo app synchronization inconsistencies and conflicting field ownership when using Server Side Apply with ArgoCD sync. This update is classified as important and addresses CVE-2026-42504. No known exploits are reported in the wild at this time.

References

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