# CVE-2026-91995

## Summary

- **CVE ID:** CVE-2026-91995
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-620
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## 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.

## Affected Products

- pig-mesh — pig (0)

## References

- [CNA](https://github.com/geo-chen/oss/blob/main/pig.md)
- [CNA](https://github.com/pig-mesh/pig/issues/1249)
- [CNA](https://github.com/pig-mesh/pig/commit/ce958668f399110b97b3f1fcc5f517ff9bcfd535)
- [CNA](https://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#L650-L669)
- [CNA](https://github.com/pig-mesh/pig/blob/v4.0.0/pig-upms/pig-upms-biz/src/main/java/com/pig4cloud/pig/admin/controller/SysRegisterController.java#L21-L53)
- [CNA](https://github.com/pig-mesh/pig)
- [CNA](https://www.vulncheck.com/advisories/pig-before-4.1.0-unverified-password-change-via-register-password)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.61%
- **EPSS Percentile:** 47.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._