Vulnerability · Published Aug 19, 2026 · Assigned by VulDB

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

Medium 4.7

In plain English

A medium-severity XML external entity in pkp-lib from pkp. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 3.1)4.7Medium

Exploit odds (30 days)0.5%top 60.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
pkp	pkp-lib	3.3.0-223.4.0-103.5.0-4

Weakness: CWE-611, CWE-610 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C

References

VDB-393037 | pkp pkp-lib XSLTransformer.php _transformPHP xml external entity reference vdb-entry, technical-description
VDB-393037 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-76572 | CVE Analysis and Report third-party-advisory
Submit #878359 | Public Knowledge Project OJS/OMP/OPS 3.3.0-22 and older XML Injection third-party-advisory
https://github.com/pkp/pkp-lib/issues/12977 issue-tracking
https://github.com/pkp/pkp-lib/commit/78c699370ea43ae2784e1c4ace7c947d207f2b47 patch
https://github.com/pkp/pkp-lib/releases/tag/3_5_0-5 patch
https://github.com/pkp/pkp-lib/ product