Is CVE-2026-7258 actively exploited?

No active exploitation of CVE-2026-7258 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-7258 be exploited remotely?

Yes. CVE-2026-7258 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-7258?

CVE-2026-7258 has a CVSS score of 7.5 (HIGH).

HOME VULNERABILITIESCVE-2026-7258

HIGH

CVE-2026-7258

CWE-125Published: May 10, 2026· Updated: May 12, 2026

7.5

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.1th

Official 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.

NVD Source

Technical Analysis

CVE-2026-7258 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.