CVE-2026-7259
Description
In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a mismatch between encoding lists in Oniguruma and mbfl leads to a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2026-7259
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2026-7259.html
Vendor advisory: security@php.net — https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 8.2.31-1~deb12u1 |
| debian | forky | fixed | 8.4.21-1 |
| debian | sid | fixed | 8.4.21-1 |
| debian | trixie | fixed | 8.4.21-1~deb13u1 |
| debian | bullseye | fixed | 0 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| php | php | {"startIncluding":"8.2.0","endExcluding":"8.2.31"} | 8.2.31 |
References
CWEs
CWE-476
Verify integrity in audit chain (admin only). AS-IS.