ESLog inGet started free
Critical 9.8 CVSS 3.1 PHP Published on 2026-07-30

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

CVECVE-2026-17544 GHSANo GHSA advisory
View at the source View JSON Last modified at the source: 2026-10-23

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.

Original text by NVD (NIST), public domain.

CVSS metrics 3.1

Source: security@php.net · secondary
Critical 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vectorNetwork
ComplexityLow
Attack requirementsNone
Privileges requiredNone
User interactionNone
Confidentiality (system)High
Integrity (system)High
Availability (system)High
Confidentiality (others)None
Integrity (others)None
Availability (others)None

References

Found a vulnerability?

Write to the PrestaShop core security team:

security-core@prestashop.com

Related advisories

PHP (29)
IDAdvisoryComponentSeverityAffected versionsPublishedFix
CVE-2026-109619 PHP has various global state that temporarily points into request memory. PHP Critical 9.2 ≥ 5.4.0 < 8.2.35
≥ 8.3.0 < 8.3.36
≥ 8.4.0 < 8.4.27
+1 2026-10-21 No
CVE-2026-109618 PHP uses longjmp() for out-of-memory (OOM) errors to exit the current context and abort handling of the request. PHP Critical 9.8 ≥ 7.3.0 < 8.2.35
≥ 8.3.0 < 8.3.36
≥ 8.4.0 < 8.4.27
+1 2026-10-21 No
CVE-2026-91765 cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. PHP High 7.5 ≥ 8.2.0 < 8.2.34
≥ 8.3.0 < 8.3.35
≥ 8.4.0 < 8.4.26
+1 2026-09-25 No
CVE-2026-17543 Improper escaping of backslashes in attacker-provided parameters would allow for trivial SQL injection in PHP versions… PHP Critical 9.8 ≥ 8.2.0 < 8.2.33
≥ 8.3.0 < 8.3.33
≥ 8.4.0 < 8.4.24
+1 2026-07-30 No

Does your server run PHP 8.4.x ≥ 8.4.0 < 8.4.24, 8.5.x ≥ 8.5.0 < 8.5.9?

PrestaShield checks it from the outside, without FTP access, and alerts you of every new advisory that affects you.
Check if my shop is affected