CVE-2026-91995: pig · Unverified Password Change
Affects pigSource CVE Database V5
Not known to be exploited · CVSS 9.3 Critical : upgrade to 4.1.0 as a priority.
Data as of 30 Oct 2026, 11:52 UTC
- EPSS
- 0.8% chance of exploitation in 30 days – higher than 58% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 4.1.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 15 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.
What to do
Upgrade pig to 4.1.0.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| pig-meshpig | Affected
| Fixed in
|
GitHubpigpkg:github/pigOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix is available in pig-mesh pig version 4.1.0 and later. Users should upgrade to version 4.1.0 or above to remediate this vulnerability. Until the upgrade is applied, restrict access to the /register/password endpoint and monitor for suspicious password change attempts.
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.
References
- github.com/geo-chen/oss/blob/main/pig.md (opens in a new tab)
- github.com/pig-mesh/pig/issues/1249 (opens in a new tab)
- github.com/pig-mesh/pig/commit/ce958668f399110b97b3f1fcc5f517ff9bcfd535 (opens in a new tab)
- github.com/pig-mesh/pig/blob/v4.0.0/pig-upms/pig-upms-biz/src/main/java/com/pig4cloud/pig/admin/service/impl/SysUserServiceImpl.java (opens in a new tab)
- github.com/pig-mesh/pig/blob/v4.0.0/pig-upms/pig-upms-biz/src/main/java/com/pig4cloud/pig/admin/controller/SysRegisterController.java (opens in a new tab)
- github.com/pig-mesh/pig (opens in a new tab)
- vulncheck.com/advisories/pig-before-4.1.0-unverified-password-change-via-register-password (opens in a new tab)