CVE-2026-47085

mediumpriority · track · 0EPSS 0.003 · 22 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.30% (22nd) EPSS

CVSS 4 · medium

Is it mine?

4 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-28

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH token forgery can occur via a missing mboxkey. If an attacker knew a folder name on the victim's account for which the victim had never issued an auth URL, they could forge a working URLAUTH token by computing an HMAC-SHA1 value with a predictable key, giving them read access to the mailbox. (URLAUTH is an obscure feature, meaning that the odds of any user actually being susceptible to this attack are very low. Perhaps no public clients use URLAUTH.)

cvss

Technical severity, 0–10. One row per scoring source.

4.0

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–4

v3.14mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:Nsecondary · ENISA EU

v3.14mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:Nsecondary · cve@mitre.org USexploitability 2.2 · impact 1.4

v3.13.7lowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-340USprimary

affected products (4)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Open Source cyrus imap< 3.12.3cert_bundDE
cyrusimap Cyrus IMAP0 → 3.12.3enisa_euvdEU

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2387cyrus imap: Mehrere SchwachstellenDeutsch2026-07-16csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in cyrus imap ausnutzen, um Sicherheitsvorkehrungen zu umgehen und Daten offenzulegen oder zu manipulieren.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund NVD CVE.org MITRE

published 2026-07-16modified 2026-10-24

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references (7)

External citations — patches, advisories, analysis.

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