3.5

CVE-2026-47086: cyrusimap cyrus_imap Incorrect Authorization

CVSS: 3.5v3.1LowDeferred
AliasesUBUNTU-CVE-2026-47086DEBIAN-CVE-2026-47086
Published 16-07-2026Last modified 16-07-2026
Open JSON

Vulnerability summary

CVE-2026-47086 is a low (CVSS 3.5) Incorrect Authorization vulnerability in cyrusimap cyrus_imap. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 17.6% of scored vulnerabilities.

Overall risk
14/100
0100
Low · default modelHow is this calculated?
CVSS score
3.5/10
010
Low · v3.1 (CVE.org)
EPSS score
0.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:21368-1

Timeline

  1. 16-07-2026
    PublishedVulnerability first disclosed.
  2. 16-07-2026
    Last modifiedVulnerability information updated.

Description

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. GENURLAUTH-issued tokens can bypass ACLs. Any authenticated user could mint a URLAUTH token (via the GENURLAUTH command) for any mailbox they could name, even without read access on it. This would allow reading mail from mailboxes despite having no granted permissions.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

18%

Versus all other CVEs

30-day change

0.00 pp

From 0.27% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.27%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Cyrusimap1 product
Debian1 product
  • cyrus-imapd< 3.6.1-4+deb12u5 | < 3.10.2-1+deb13u2 | < 3.12.3-1
Ubuntu1 product
  • cyrus-imapdAll versions (No fix recorded)

3 vendors · 3 products

References

5 links