CVE-2026-34179: Canonical lxd · Mass Assignment
Affects Canonical lxdSource CVE Database V5
Not known to be exploited · CVSS 9.1 Critical · fixed in 6.8.0 : patch Canonical lxd as a priority.
Data as of 29 Oct 2026, 19:04 UTC
Contested
Critical score, yet low EPSS after six months- EPSS
- 0.2% chance of exploitation in 30 days – higher than 19% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 6.8.0, 5.21.5, 5.0.7
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 9 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 29 Oct 2026.
What to do
Upgrade Canonical lxd to 6.8.0, 5.21.5 or 5.0.7.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Canonicallxd | Affected
| Fixed in
|
| Canonicallxd | Affected
| Fixed in
|
| Canonicallxd | Affected
| Fixed in
|
GitHubcanonical/lxdpkg:github/canonical/lxdOther threats | Affected
| Fixed in– |
GitHublxdpkg:github/lxdOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
If you cannot patch yet, restrict access to the /1.0/certificates/{fingerprint} endpoint to trusted users only and monitor for suspicious certificate update activities. Avoid granting unnecessary TLS certificate user privileges to reduce risk.
Description
CVE-2026-34179 is a critical vulnerability in Canonical LXD versions 4.12 through 6.7 where the doCertificateUpdate function fails to validate the Type field in certificate update requests. This flaw allows a remote authenticated attacker with restricted TLS certificate user privileges to escalate their privileges to cluster admin. The vulnerability has a CVSS score of 9.1, indicating a high severity with network attack vector, low attack complexity, and no user interaction required. There are no known exploits in the wild at this time.