CVE-2026-91995 pig before 4.1.0 Unverified Password Change via /register/password
Attackers can bypass password verification to overwrite any account credentials, including admin, gaining full control.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91995?
CVE-2026-91995 is a critical authentication bypass vulnerability in pig-mesh pig, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-620
Which versions are affected by CVE-2026-91995?
How do I fix CVE-2026-91995?
No fix has been published for CVE-2026-91995 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-91995 being exploited?
There is no known exploitation of CVE-2026-91995 in the wild and no public exploit code.
Sources
Also known as GHSA-7g92-2j5x-mj6h.