CVE-2026-17544NVD

Vulnerability Summary

Attacker-provided inputs to bccomp() could lead to an out-of-bounds write with stack and heap corruption in PHP versions from 8.4.* before 8.4.24 and from 8.5.* before 8.5.9.

Severity Level

UNKNOWN

Published Date

Jul 30, 2026

Last Modified

Jul 31, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.43%Probability

Root Weakness (CWE)

CWE-787: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v4.0 Base Metrics — Score 8.1 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Attack RequirementsNone

Privileges RequiredNone

User InteractionNone

Confidentiality (Vulnerable System)High

Integrity (Vulnerable System)High

Availability (Vulnerable System)High

Confidentiality (Subsequent System)None

Integrity (Subsequent System)None

Availability (Subsequent System)None

Affected & Patched Versions

Affected Versions

PHP Group PHP >= 8.4.* and < 8.4.24
PHP Group PHP >= 8.5.* and < 8.5.9

Patched Versions

PHP Group PHP 8.4.24
PHP Group PHP 8.5.9

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