Php · Php · CVE-2026-17544
**Name of the Vulnerable Software and Affected Versions**
PHP versions 8.4.0 through 8.4.23
PHP versions 8.5.0 through 8.5.8
**Description**
Attacker-provided inputs to the `bccomp()` function can lead to an out-of-bounds write, resulting in stack and heap corruption. An out-of-bounds write occurs when a program writes data past the end of the intended buffer, potentially overwriting adjacent memory.
**Recommendations**
Update PHP versions 8.4.0 through 8.4.23 to version 8.4.24.
Update PHP versions 8.5.0 through 8.5.8 to version 8.5.9.
As a temporary workaround, restrict the use of the `bccomp()` function until the updates are applied.