CVE-2026-34179GO-2026-5306GHSA-C3H3-89QF-JQM5
Update of type field in restricted TLS certificate allows privilege escalation to cluster admin
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 5.0.7, 5.21.5, 6.8.0
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: poc
- Automatable: no
- Technical impact: total
Summary
In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate the Type field when handling PUT/PATCH requests to /1.0/certificates/{fingerprint} for restricted TLS certificate users, allowing a remote authenticated attacker to escalate privileges to cluster admin.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: poc · Automatable: no · Technical impact: total
- Record last updated
Affected versions
- lxd
From 4.12.0 · fixed in 5.0.7; From 5.1.0 · fixed in 5.21.5; From 6.0.0 · fixed in 6.8.0
- github.com/canonical/lxdGo
All versions
- github.com/canonical/lxdGo
From 0.0.0-20210305023314-538ac3df036e · through 0.0.0-20260226085519-736f34afb267