Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-61908

CVE-2026-61908MEDIUM

cyrusimap Cyrus IMAP — An issue was discovered in Cyrus IMAP before 3.12.4.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   L   N  U  H  N  N    6.5   .0022   11.9     —

AFFECTED
  Product     Versions     Fixed
  Cyrus IMAP  unspecified  —

TIMELINE
  Jul 13  Reserved by mitre
  Sep 9   Published (CNA: mitre)
  Sep 16  RESCORED — CVE-2026-61908 (cyrusimap Cyrus IMAP). CVSS 3.1 → 6.5 (NVD).

CWE-125 · CNA: mitre · CVSS v3.1 · 4 references · NVD status: Analyzed

Description

An issue was discovered in Cyrus IMAP before 3.12.4. A JMAP email-header blob ID can reference an out-of-bounds index. An authenticated user could attempt to download a crafted JMAP blob ID of the form H<emailid>-<index>, which could read past the end of the internal blob_headers array during download, exposing adjacent heap memory.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
July 13, 2026	Reserved	Reserved by mitre
September 9, 2026	Published	Published (CNA: mitre)
September 16, 2026	RESCORED	RESCORED — CVE-2026-61908 (cyrusimap Cyrus IMAP). CVSS 3.1 → 6.5 (NVD).

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
cyrusimap	Cyrus IMAP	—	—	—

Weaknesses

CWE-125

References (4)

https://cyrusimap.org [Product]
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.10/x/3.10.4.html [Release Notes]
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.4.html [Release Notes]
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.8/x/3.8.8.html [Release Notes]

Authoritative record: CVE-2026-61908 at cve.org

Vendors: cyrusimap

Weaknesses: CWE-125

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-61908 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 Sunday, October 4, 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.