CVE-2026-7258
Out-of-bounds read in urldecode() on NetBSD
7.5
HIGH
CVSS 3.1
EPSS 0.02%
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.
How to fix CVE-2026-7258
To remediate CVE-2026-7258, upgrade the affected package to a fixed version below.
- —upgrade to 8.2.31 or later
- —upgrade to 8.2.31 or later
- —upgrade to 8.2.31 or later
- —upgrade to 7.4.33-1+deb11u11 or later
- —upgrade to 8.2.31-1~deb12u1 or later
- —upgrade to 8.4.21-1~deb13u1 or later
Is CVE-2026-7258 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (6)
- >= 8.2.0, < 8.2.31, >= 8.3.0, < 8.3.31, >= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6
- >= 8.2.0, < 8.2.31, >= 8.3.0, < 8.3.31, >= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6
- >= 8.2.0, < 8.2.31, >= 8.3.0, < 8.3.31, >= 8.4.0, < 8.4.21, >= 8.5.0, < 8.5.6
- from 0, < 7.4.33-1+deb11u11
- from 0, < 8.2.31-1~deb12u1
- from 0, < 8.4.21-1~deb13u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS: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 | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |