CVE-2025-6491
- Source
- https://cve.org/CVERecord?id=CVE-2025-6491
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-6491.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-6491
- Aliases
-
- BIT-libphp-2025-6491
- BIT-php-2025-6491
- BIT-php-min-2025-6491
- GHSA-453j-q27h-5p8x
- Downstream
- Related
- Published
- 2025-07-13T22:10:15.996Z
- Modified
- 2026-06-18T03:55:40.625460789Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- NULL Pointer Dereference in PHP SOAP Extension via Large XML Namespace Prefix
- Details
-
In PHP versions:8.1.* before 8.1.33, 8.2.* before 8.2.29, 8.3.* before 8.3.23, 8.4.* before 8.4.10 when parsing XML data in SOAP extensions, overly large (>2Gb) XML namespace prefix may lead to null pointer dereference. This may lead to crashes and affect the availability of the target server.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6491.json", "cna_assigner": "php", "cwe_ids": [ "CWE-476" ] }- References
-
- http://www.openwall.com/lists/oss-security/2025/07/11/4
- https://lists.debian.org/debian-lts-announce/2025/07/msg00017.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/6xxx/CVE-2025-6491.json
- https://github.com/php/php-src/security/advisories/GHSA-453j-q27h-5p8x
- https://nvd.nist.gov/vuln/detail/CVE-2025-6491
Affected packages
Git / github.com/php/php-src
Affected ranges
- Type
- GIT
- Repo
- https://github.com/php/php-src
- Events
-
IntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixed
- Database specific
{ "extracted_events": [ { "introduced": "8.1.0" }, { "fixed": "8.1.33" }, { "introduced": "8.2.0" }, { "fixed": "8.2.29" }, { "introduced": "8.3.0" }, { "fixed": "8.3.23" }, { "introduced": "8.4.0" }, { "fixed": "8.4.10" } ], "cpe": "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*", "source": "CPE_RANGE" }