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Fencer Vulns
low 3.5

CVE-2026-47087 json

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2.

published 2026-07-16 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-45010

cvss
3.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 21%
public exploits
0
none known

Summary

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH does not honor revoked authorizer access. A URLAUTH URL minted while the authorizer had access continued to work after that access was revoked.

Patch / fix

  • cyrusimap Cyrus IMAP 3.12.3
  • cyrus-imapd Debian 12 3.6.1-4+deb12u5
  • cyrus-imapd Debian 13 3.10.2-1+deb13u2
  • cyrus-imapd Debian 14 3.12.3-1

debian advisories DEBIAN-CVE-2026-47087

  • cyrus-imapd openSUSE Leap 16.0 3.8.7-bp160.1.1

opensuse advisories openSUSE-SU-2026:21368-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-47087 updated cvss 3.5

cyrus-imapd: Cyrus IMAP: Unauthorized access due to URLAUTH not honoring revoked authorizer access

  • Red Hat Enterprise Linux 6 cyrus-imapd, cyrus-imapd-utils Red Hat Enterprise Linux 7 cyrus-imapd, cyrus-imapd-utils
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 cyrus-imapd, cyrus-imapd-vzic, cyrus-imapd-utils Red Hat Enterprise Linux 9 perl-Cyrus, cyrus-imapd, cyrus-imapd-libs, cyrus-imapd-utils Red Hat Enterprise Linux 10 cyrus-imapd
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

Affected products

  • cyrusimap Cyrus IMAP

Classification

Weakness
  • CWE-672 Operation on a Resource after Expiration or Release

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.