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CVE-2026-54787VulnerabilityPublished Updated

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Affects Red Hat sigstore-goSource GCVE Database

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Mentioned vulnerabilities

Authoritative record:CVE-2026-54787· Low 3.1

Not known to be exploited · CVSS 3.1 Low.

Data as of 1 Nov 2026, 22:58 UTC

CVSS 3.1 base score
3.1Low
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 2% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 31 Jul 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 1 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10sigstore-gopkg:deb/ubuntu/sigstore-go?arch=source&distro=stonkingOther threatsAffected
  • =1.1.4-1
  • =1.3.0-1
Fixed in–
Ubuntu Pro 26.04 LTSsigstore-gopkg:deb/ubuntu/sigstore-go?arch=source&distro=esm-apps/resoluteOther threatsAffected
  • 0.7.1-2 – 1.1.4-1ubuntu0.26.04.1~esm1
5 affected builds
Fixed in–

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

AI-suggested

A patch is available in cosign version 3.1.2-r1. Users of affected Red Hat Hardened Images and related products should update to this version to remediate the vulnerabilities. The vendor advisory RHSA-2026:47891 provides official guidance on applying the update. No additional mitigations are specified or required beyond applying the official patch.

Description

This update includes the following RPMs: cosign: * cosign-3.1.2-0.2.hum1 (aarch64, x86_64) * cosign-3.1.2-0.2.hum1.src (src) Security Fix(es): cosign: * CVE-2026-56852

References

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