CLEANSTART-2026-XB16901

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Import Source
https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-XB16901.json
JSON Data
https://api.osv.dev/v1/vulns/CLEANSTART-2026-XB16901
Upstream
Published
2026-01-30T17:13:56.781902Z
Modified
2026-03-09T12:25:23.658499Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers
Details

Multiple security vulnerabilities affect the nginx package. When multiple server blocks are configured to share the same IP address and port, an attacker can use session resumption to bypass client certificate authentication requirements on these servers. See references for individual vulnerability details.

References

Affected packages

CleanStart / nginx

Package

Name
nginx

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.26.3-r0

Database specific

source 
"https://github.com/cleanstart-dev/cleanstart-security-advisories/blob/main/advisories/2026/CLEANSTART-2026-XB16901.json"