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VulnerabilityPublished

CVE-2026-52727: lxc-ci · Use of Hard-coded Cryptographic Key

Affects lxc-ciSource CVE Database V5

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Not known to be exploited · CVSS 7.2 High : upgrade to 2026-05-28 soon.

Data as of 1 Nov 2026, 22:58 UTC

CVSS 3.1 base score
7.2High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.5% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2026-05-28
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Sep 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

Upgrade lxc-ci and lxc/lxc-ci to 2026-05-28.

Affected software

ProductAffectedFixed in
lxclxc-ciAffected
  • <2026-05-28
Fixed in
  • 2026-05-28
GitHublxc/lxc-cipkg:github/lxc/lxc-ciOther threatsAffected
  • <2026-05-28
Fixed in
  • 2026-05-28

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

AI-suggested

This vulnerability is fixed in Arch Linux images published on or after 2026-05-28. Users should update to these fixed images to mitigate the issue. No additional mitigation steps are indicated beyond upgrading to the fixed image versions.

Description

A vulnerability in lxc-ci's Arch Linux images prior to 2026-05-28 involves the use of a hard-coded pacman local-signing private key. This key is embedded in the image and distributed to all containers or virtual machines created from it. An attacker who can control or intercept HTTP package mirror traffic can misuse this key to sign malicious packages, which affected clients will trust and install. Successful exploitation allows arbitrary code execution with root privileges on the client system. The issue is fixed in Arch Linux images published on or after 2026-05-28.

References

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