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CVE-2026-27140VulnerabilityPublished Updated

Red Hat Security Advisory: golang security update

Affects Red Hat golangSource GCVE Database

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Authoritative record:CVE-2026-27140· High 8.8

Not known to be exploited · CVSS 8.8 High : upgrade Red Hat go to 1.26.2 or 1.25.9 soon.

Data as of 30 Oct 2026, 20:25 UTC

CVSS 3.1 base score
8.8High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 51% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 1.26.2, 1.25.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 Apr 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 30 Oct 2026.

What to do

Upgrade cmd/go to 1.26.2 or 1.25.9.

Affected software

ProductAffectedFixed in
Go toolchaincmd/goAffected
  • >=1.26.0-0 <1.26.2
Fixed in
  • 1.26.2
Go toolchaincmd/goAffected
  • <1.25.9
Fixed in
  • 1.25.9
Gocmd/gopkg:golang/cmd/goOther threatsAffected
  • <1.25.9
  • >=1.26.0-0 <1.26.2
Fixed in
  • 1.25.9
  • 1.26.2

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 (golang-1.19.13-25.el9_2) that addresses CVE-2026-27140. Users of Red Hat Enterprise Linux 9.2 should apply this update promptly to remediate the vulnerability. Detailed instructions for applying the update are available at https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by Red Hat beyond applying the provided update.

Description

A security vulnerability (CVE-2026-27140) affecting the golang packages in Red Hat Enterprise Linux 9.2 allows arbitrary code execution via malicious SWIG file names. This flaw exists in the Go programming language compiler and its cmd/go tool. Red Hat has issued an important security update to address this issue. The vulnerability is rated with high severity by Red Hat Product Security. No public exploit code or in-the-wild exploitation is currently known. The update is available for multiple architectures and variants of Red Hat Enterprise Linux 9.2.

References

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