CVE-2026-91995

Critical

Description

pig before 4.1.0 contains an authentication bypass vulnerability in the /register/password endpoint where password verification results are discarded, allowing any value as the current password. Remote attackers can submit a username with an incorrect current password to overwrite any account credential including the admin account and gain full administrative control.

SeverityCritical

CVSS9.1

Exploit probability—

ProductPig

PublishedSep 15, 2026

First seenSep 15, 2026

Weakness typeCWE-620CWE-620

How to fix

Update

pig-mesh pig4.1.0 or later

Patches

github.com/pig-mesh/pig/commit/ce958668f399110b97b3f1fcc5f517ff9bcfd535

Affected products

Product	Affected versions	Fixed in
pig-mesh pig	v < 4.1.0	4.1.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.