DEBIAN-CVE-2026-91768
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-91768
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-91768.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-91768
- Upstream
- CVE-2026-91768
- Published
- 2026-09-25T22:18:49Z
- Modified
- 2026-09-26T05:00:31Z
- Severity
-
- 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- Summary
- [none]
- Details
-
The IPv6 branch of the FastCGI client access check compares only the first 12 bytes of a 16-byte IPv6 address, so listen.allowed_clients matches on a /96 prefix instead of the exact address. An attacker who can source an address sharing the first 96 bits with an allowed one passes the check and reaches the FastCGI endpoint.
- References
Affected packages
Debian:12 / php8.2
Package
- Name
- php8.2
- Purl
- pkg:deb/debian/php8.2?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Affected versions
8.*
8.2.5-2
8.2.7-1~deb12u1
8.2.7-1
8.2.7-1.1
8.2.7-1.2
8.2.10-1
8.2.10-2
8.2.12-1
8.2.16-1
8.2.16-2
8.2.17-1
8.2.18-1~deb12u1
8.2.18-1
8.2.20-1~deb12u1
8.2.20-2
8.2.20-3
8.2.21-1
8.2.23-1
8.2.24-1~deb12u1
8.2.24-1
8.2.26-1~deb12u1
8.2.26-4
8.2.27-1
8.2.28-1~deb12u1
8.2.29-1~deb12u1
8.2.30-1~deb12u1
8.2.31-1~deb12u1
8.2.32-1~deb12u1
8.2.33-1~deb12u1
Debian:13 / php8.4
Package
- Name
- php8.4
- Purl
- pkg:deb/debian/php8.4?arch=source&distro=trixie
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affectedFixed8.4.26-1~deb13u1
Debian:14 / php8.4
Package
- Name
- php8.4
- Purl
- pkg:deb/debian/php8.4?arch=source&distro=forky
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected