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TI-2026-76242 Aliases CVE-2026-16487GHSA-66j5-6c8v-q8pj

Bootc applies unsigned content under default containers policy

Priority LOW 34CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-345.

Summary

Bootc with containers-common applies unsigned content during automatic or manual upgrades of a mutable image tag when the default containers signature policy falls through to insecureAcceptAnything. The flaw is a failure to verify content authenticity (CWE-345). An attacker who can update that tag can run arbitrary OS content as the host root filesystem on reboot.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

A flaw was found in bootc when operating with the default containers signature policy. Automatic or manual upgrades of a mutable image tag may apply unsigned content for registries that fall through to insecureAcceptAnything, allowing an attacker who can update that tag to execute arbitrary OS content as the host root filesystem on reboot.

Why it matters now

EPSS 0.00173 6th percentileScored 2026-10-20
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat Enterprise Linux 10——No fix listedCNA
Red HatRed Hat Enterprise Linux 10——No fix listedCNA
Red HatRed Hat Enterprise Linux 8——No fix listedCNA
Red HatRed Hat Enterprise Linux 9——No fix listedCNA
Red HatRed Hat Enterprise Linux 9——No fix listedCNA
Red HatRed Hat Hardened Images——No fix listedCNA
Red HatRed Hat Hardened Images——No fix listedCNA
Red HatRed Hat OpenShift Container Platform 4——Not affectedCNA
Red HatRed Hat OpenShift Container Platform 4——Not affectedCNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 10 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 8 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux 9 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Hardened Images VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Hardened Images VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat OpenShift Container Platform 4 VendorRed Hat Affected — Fixed in — Not affected CNA

CPE names CNA · 5

CPEVersionsRoleVendor
cpe:/o:redhat:enterprise_linux:1010—Red Hat
cpe:/o:redhat:enterprise_linux:88—Red Hat
cpe:/o:redhat:enterprise_linux:99—Red Hat
cpe:/a:redhat:hummingbird:11—Red Hat
cpe:/a:redhat:openshift:44—Red Hat
  • cpe:/o:redhat:enterprise_linux:10 Versions 10 — ·Red Hat
  • cpe:/o:redhat:enterprise_linux:8 Versions 8 — ·Red Hat
  • cpe:/o:redhat:enterprise_linux:9 Versions 9 — ·Red Hat
  • cpe:/a:redhat:hummingbird:1 Versions 1 — ·Red Hat
  • cpe:/a:redhat:openshift:4 Versions 4 — ·Red Hat

Remediation

No fixed version is listed for Red Hat Enterprise Linux 8, 9 and 10, or for Red Hat Hardened Images.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 6 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9
  • Red Hat Hardened Images
  • Red Hat OpenShift Container Platform 4
  • Red Hat OpenShift Container Platform 5

Timeline

  1. 2026-10-19 Threatist record created from CVE-2026-16487
  2. 2026-10-19 Affected versions changed · Red Hat
  3. 2026-10-19 CVSS score added · Red Hat
  4. 2026-10-19 Alias added: GHSA-66j5-6c8v-q8pj
  5. 2026-10-19 Priority changed: MEDIUM → LOW
  6. 2026-10-21 Affected versions changed · Red Hat
  7. 2026-11-03 Affected versions changed · Red Hat

References

Other 2

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences