UNKNOWN

CVE-2026-17544

Out-of-bounds write in bccomp() via crafted operand and scale

CVSS v3

—

Unknown

EPSS Score

0.4 %

exploit probability, as of 2026-10-04

CISA KEV

known exploited

Exploitation

none

SSVC status

Description

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.

Technical details

Published: 2026-07-30
Last Modified: 2026-07-31

Frequently asked questions

What is CVE-2026-17544?

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.

Is CVE-2026-17544 actively exploited?

Active exploitation of CVE-2026-17544 has not been confirmed. Its EPSS score was 0.4% on 2026-10-04, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-17544?

A CVSS score has not been assigned to CVE-2026-17544 yet.

Is CVE-2026-17544 affecting your environment?

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