6.5

CVE-2026-7259: php_group php NULL Pointer Dereference

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-7259DEBIAN-CVE-2026-7259CGA-4whf-5gp5-h3xv
Published 10-05-2026Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2026-7259 is a medium (CVSS 6.5) NULL Pointer Dereference vulnerability in php_group php. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 26.5% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.34%
0%100%
Low · +0.14 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 4 · Related 3
MGASA-2026-0127OPENSUSE-SU-2026:10747-1RHSA-2026:23388RHSA-2026:33449CGA-Q48J-64M5-6J24USN-8336-1

Timeline

  1. 10-05-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

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().

CVSS metrics

6 scores · 4 sources · 2 versions

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

+0.14 pp

From 0.20% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.34%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu4 products
  • php8.1< 8.1.2-1ubuntu2.24
  • php8.3< 8.3.6-0ubuntu0.24.04.9
  • php8.4< 8.4.11-1ubuntu1.2
  • php8.5< 8.5.4-0ubuntu1.1
Debian2 products
  • php8.2< 8.2.31-1~deb12u1
  • php8.4< 8.4.21-1~deb13u1 | < 8.4.21-1
Chainguard1 product
  • php-8.2< 8.2.31-r0
Php1 product
  • php≥ 8.2.0, < 8.2.31 | ≥ 8.3.0, < 8.3.31 | ≥ 8.4.0, < 8.4.21 | ≥ 8.5.0, < 8.5.6
Php_group1 product
  • php≥ 8.2.*, < 8.2.31 | ≥ 8.3.*, < 8.3.31 | ≥ 8.4.*, < 8.4.21 | ≥ 8.5.*, < 8.5.6
Wolfi1 product
  • php-8.2< 8.2.31-r0

6 vendors · 10 products

References

6 links