CVE-2026-78187

A vulnerability has been found in Piwigo 16.3.0. This impacts an unknown function of the component Public Authentication Page. Such manipulation of the argument lang leads to cross site scripting. The attack may be performed from remote. A high complexity level is associated with this attack. The exploitability is said to be difficult. The exploit has been disclosed to the public and may be used. Upgrading to version 16.4.0 will fix this issue. The name of the patch is 5277a7dee4b8f1a174f1d69e1e2a4e1c82a3fc9e. It is recommended to upgrade the affected component.

• CWE-79
• CWE-94

• https://github.com/Leousum/VulnPoC/blob/main/Piwigo%2016.3.0/reflected_XSS.md
• https://github.com/Piwigo/Piwigo/
• https://github.com/Piwigo/Piwigo/commit/5277a7dee4b8f1a174f1d69e1e2a4e1c82a3fc9e
• https://github.com/Piwigo/Piwigo/releases/tag/16.4.0
• https://github.com/Piwigo/Piwigo/security/advisories/GHSA-rr39-mf4j-6594
• https://vuldb.com/cve/CVE-2026-78187
• https://vuldb.com/submit/885228
• https://vuldb.com/vuln/394569
• https://vuldb.com/vuln/394569/cti

Published

Aug 24, 2026

Last Modified

Aug 24, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-78180A security flaw has been discovered in alibaba-fusion next u…7.3
• CVE-2026-78181A weakness has been identified in ractivejs ractive up to 1.…7.3
• CVE-2026-78182A security vulnerability has been detected in Shenzhen Gongj…7.3
• CVE-2026-78183DBD::Pg version 3.21.0 for Perl has a heap out-of-bounds wri…
• CVE-2026-78185A vulnerability was detected in itsourcecode Sales and Inven…6.3
• CVE-2026-78186A flaw has been found in Open5GS up to 2.8.0. This affects a…4.3
• CVE-2026-7819Symbolic-link path traversal (CWE-61, CWE-22) in pgAdmin 4 F…8.1
• CVE-2026-78196A security flaw has been discovered in achorein expo-share-i…4.4
• CVE-2026-78197A weakness has been identified in SourceCodester Simple Onli…7.3
• CVE-2026-78198A security vulnerability has been detected in SourceCodester…7.3
• CVE-2026-78199A vulnerability was detected in SourceCodester Simple Online…7.3
• CVE-2026-7820Improper restriction of excessive authentication attempts (C…6.9