Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-91995

CVE-2026-91995CRITICAL

pig-mesh pig — pig before 4.1.0 Unverified Password Change via /register/password

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   H   H   N    9.3   .0088   57.6     —

AFFECTED
  Product  Versions     Fixed
  pig      unspecified  —

TIMELINE
  Sep 15  Reserved by VulnCheck
  Sep 15  Published (CNA: VulnCheck)
  Sep 18  EXPLOIT PUBLISHED — CVE-2026-91995 (pig-mesh pig). Public exploit reference added.
  Sep 24  EXPLOIT PUBLISHED — CVE-2026-91995 (pig-mesh pig). Public exploit reference added.

CWE-620 · CNA: VulnCheck · CVSS v4.0 · 7 references · NVD status: Deferred

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
September 15, 2026	Reserved	Reserved by VulnCheck
September 15, 2026	Published	Published (CNA: VulnCheck)
September 18, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-91995 (pig-mesh pig). Public exploit reference added.
September 24, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-91995 (pig-mesh pig). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
pig-mesh	pig	—	—	—

Weaknesses

CWE-620

References (7)

Authoritative record: CVE-2026-91995 at cve.org

Vendors: pig-mesh

Weaknesses: CWE-620

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-91995 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.