CVE-2026-7258: php_group php Out-of-bounds Read
Vulnerability summary
CVE-2026-7258 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in php_group php. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 33.3% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 10 · Related 2Timeline
- 10-05-2026PublishedVulnerability first disclosed.
- 11-05-2026Last 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, some functions, including urldecode(), pass signed char to ctype functions (like isxdigit()). On the systems with default signed char and optimized table-lookup ctype functions - such as NetBSD - this can lead to accessing array with negative offset, which can trigger a denial of service.
CVSS metrics
8 scores · 6 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/U:Amber
- OSV · WolfiEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/U:Amber
- OSV · ChainguardEcosystem advisory · calculated6.3MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/U:Amber
- NVDNIST6.3MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Amber
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
33%
Versus all other CVEs
30-day change
+0.07 pp
From 0.34% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu3 products
- 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, < 8.2.21 | ≥ 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 · 9 products
