Fossil before 2.14.2 and 2.15.x before 2.15.2 often skips the hostname check during TLS certificate validation.
Priority LOW 34CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-295.
Summary
Fossil before 2.14.2 and 2.15.x before 2.15.2 often skips the hostname check during TLS certificate validation.
Why it matters now
EPSS 0.00574 47th percentileScored 2026-11-07
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:fossil-scm:fossil:*:*:*:*:*:*:*:* | before 2.14.2; 2.15.0 to before 2.15.2 | Vulnerable | Fossil-scm |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
- cpe:2.3:a:fossil-scm:fossil:*:*:*:*:*:*:*:* Versions before 2.14.2; 2.15.0 to before 2.15.2 Vulnerable ·Fossil-scm
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-36377
- 2026-10-03 Alias added: GHSA-4cqm-xv6v-78c5
References
Sources
- CVE-2021-36377 · CVE Program
- CVE-2021-36377 · NVD
- FIRST EPSS
- GHSA-4cqm-xv6v-78c5 · GitHub Advisory Database · CC BY 4.0
- CVE-2021-36377 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences