Integer overflow in PHP - CVE-2026-42371

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Main Vulnerability Database Vulnerabilities #VU130918

Integer overflow in PHP - CVE-2026-42371

Published: May 10, 2026


Vulnerability identifier: #VU130918
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-42371
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause incorrect URI parsing results.

The vulnerability exists due to numeric truncation in text range comparison in uriparser when parsing crafted URI input. A remote attacker can supply crafted URI input to cause incorrect URI parsing results.


Affected software

PHP
SecurityCenter
openEuler
Fedora
uriparser-debugsource
uriparser-help
uriparser-devel
uriparser-debuginfo
uriparser

How to mitigate CVE-2026-42371

Install security update from vendor's website.

PHP - update to 8.5.6
SecurityCenter - addressed in versions SC202607.1, SC202607.2
uriparser-debugsource - update to 1.0.1-1
uriparser-help - update to 1.0.1-1
uriparser-devel - update to 1.0.1-1
uriparser-debuginfo - update to 1.0.1-1
uriparser - update to 1.0.1-1
uriparser - addressed in versions 1.0.1-1.fc42, 1.0.1-1.fc43, 1.0.1-1.fc44, 1.0.2-1.fc43

External References

Related Security Bulletins