CVE-2026-91995

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-15. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
48%
KEV
Not listed

Published

September 15, 2026

Last Modified

September 18, 2026

Advisory Details (7)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit.
generic

pig before 4.1.0 Unverified Password Change via /register/password | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pig-before-4.1.0-unverified-password-change-via-register-password
generic

Unauthenticated · Issue #1249 · pig-mesh/pig · GitHub

https://github.com/pig-mesh/pig/issues/1249
github_commit Patch Available

commit ce958668f399 (pig-mesh/pig)

Patch available: pig-mesh/pig v4.1.0 (contains commit ce958668f399)

https://github.com/pig-mesh/pig/commit/ce958668f399110b97b3f1fcc5f517ff9bcfd535
generic

pig/pig-upms/pig-upms-biz/src/main/java/com/pig4cloud/pig/admin/service/impl/SysUserServiceImpl.java at v4.0.0 · pig-mesh/pig · GitHub

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
generic

pig/pig-upms/pig-upms-biz/src/main/java/com/pig4cloud/pig/admin/controller/SysRegisterController.java at v4.0.0 · pig-mesh/pig · GitHub

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
generic

GitHub - pig-mesh/pig: ↥ ↥ ↥ Follow for updates An RBAC permission management system based on Spring Cloud 2025, Spring Boot 4, and OAuth2. · GitHub

https://github.com/pig-mesh/pig
generic🟡 PoC Available

oss/pig.md at main · geo-chen/oss · GitHub

https://github.com/geo-chen/oss/blob/main/pig.md

Vendor Advisories for CVE-2026-91995(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 36× in last 7d / 36× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 10:05 UTCGHSA enrichment
  2. 2026-09-19 06:12 UTCGHSA enrichment
  3. 2026-09-19 02:18 UTCGHSA enrichment
  4. 2026-09-18 22:25 UTCEG score recompute
  5. 2026-09-18 22:25 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 18:33 UTCEG score recompute
  8. 2026-09-18 18:33 UTCGHSA enrichment
  9. 2026-09-18 17:29 UTCEG score recompute
  10. 2026-09-18 17:29 UTCGHSA enrichment
  11. 2026-09-18 15:20 UTCGHSA enrichment
  12. 2026-09-18 11:28 UTCGHSA enrichment
  13. 2026-09-18 07:35 UTCGHSA enrichment
  14. 2026-09-18 03:42 UTCGHSA enrichment
  15. 2026-09-17 23:49 UTCEG score recompute
  16. 2026-09-17 23:49 UTCGHSA enrichment
  17. 2026-09-17 19:32 UTCEPSS rescore
  18. 2026-09-17 19:23 UTCGHSA enrichment
  19. 2026-09-17 13:29 UTCGHSA enrichment
  20. 2026-09-17 09:27 UTCGHSA enrichment
  21. 2026-09-17 05:34 UTCGHSA enrichment
  22. 2026-09-17 01:41 UTCGHSA enrichment
  23. 2026-09-16 21:48 UTCGHSA enrichment
  24. 2026-09-16 17:55 UTCEG score recompute
  25. 2026-09-16 17:55 UTCGHSA enrichment
Show 11 more
  1. 2026-09-16 14:09 UTCEPSS rescore
  2. 2026-09-16 12:40 UTCGHSA enrichment
  3. 2026-09-16 08:48 UTCGHSA enrichment
  4. 2026-09-16 04:03 UTCGHSA enrichment
  5. 2026-09-16 00:09 UTCGHSA enrichment
  6. 2026-09-15 20:16 UTCGHSA enrichment
  7. 2026-09-15 16:23 UTCEG score recompute
  8. 2026-09-15 16:23 UTCGHSA enrichment
  9. 2026-09-15 12:30 UTCEG score recompute
  10. 2026-09-15 11:43 UTCEG score recompute
  11. 2026-09-15 11:42 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-91995?
CVE-2026-91995 is a critical vulnerability published on September 15, 2026. 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…
When was CVE-2026-91995 disclosed?
CVE-2026-91995 was first published in the National Vulnerability Database on September 15, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-91995 actively exploited?
CVE-2026-91995 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 52.3% of all scored CVEs.
What is the CVSS score of CVE-2026-91995?
CVE-2026-91995 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-91995?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-91995, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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