CVE-2026-76572: pkp pkp-lib XSLTransformer.php _transformPHP xml external entity reference

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-19 · updated 2026-08-20
Weakness: CWE-610

Description

A vulnerability was detected in pkp pkp-lib up to 3.3.0-22/3.4.0-10/3.5.0-4. The affected element is the function _transformPHP of the file classes/xslt/XSLTransformer.php. The manipulation results in xml external entity reference. The attack can be executed remotely. Upgrading to version 3.3.0-23, 3.4.0-11 and 3.5.0-5 is sufficient to fix this issue. The patch is identified as 78c699370ea43ae2784e1c4ace7c947d207f2b47. Upgrading the affected component is advised.

Affected products

pkp-lib: 3.3.0-22, 3.4.0-10, 3.5.0-4

References

https://github.com/pkp/pkp-lib/
https://github.com/pkp/pkp-lib/commit/78c699370ea43ae2784e1c4ace7c947d207f2b47
https://github.com/pkp/pkp-lib/issues/12977
https://github.com/pkp/pkp-lib/releases/tag/3_5_0-5
https://vuldb.com/cve/CVE-2026-76572
https://vuldb.com/submit/878359
https://vuldb.com/vuln/393037
https://vuldb.com/vuln/393037/cti

Get alerted when CVE-2026-76572 or the next vulnerability affects your stack