CVE-2026-126311 json
OpenBao before 2.6.5 and 2.7.2 Wildcard Principals in SSH Certificates via Identity Templates
published 18d ago modified 1h ago also EUVD-2026-125209 , GHSA-h76r-48x5-36hg
Unreviewed: the maintainers' own advisory
Published by the maintainers on their GitHub repository openbao/openbao. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.
- cvss
- 5.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 10%
- public exploits
- 0
- none known
Summary
OpenBao before 2.6.5 and 2.7.x before 2.7.2 does not neutralize wildcard characters in SSH certificate principals rendered from unvalidated external token metadata via identity templates in the SSH secrets engine. Attackers controlling that metadata, typically through a compromised identity provider, can inject '*' to obtain SSH certificates valid for multiple hosts or users.
Patch / fix
- openbao openbao 2.6.5, 2.7.2
Is CVE-2026-126311 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2h ago
Exploit prediction
0.21% chance of exploitation in the next 30 days, higher than 10% of all scored CVEs (FIRST EPSS, 2026-11-13).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 4.6 | CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N |
| CNA | 3.1 | 5.8 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N |
| CNA | 4.0 | 4.6 | CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- openbao openbao
Classification
- Weakness
-
- CWE-155 Improper Neutralization of Wildcards or Matching Symbols
References
-
github.com
/openbao/openbao/security/advisories/GHSA-h76r-48x5-36hg
vendor-advisory, advisory
-
vulncheck.com
/advisories/openbao-before-2.6.5-and-2.7.2-wildcard-principals-in-ssh-certificates-via-identity-templates
third-party-advisory
Sources
- CVE List CVE-2026-126311
- NVD CVE-2026-126311
- Maintainer advisory GHSA-h76r-48x5-36hg
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
The maintainers of openbao/openbao published their own advisory on GitHub. Reviewed sources take precedence over it.