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CVE

CVE-2026-27856

dovecot: Doveadm: Full access via timing oracle attack in credential verification (important)
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CVE

CVE-2026-27856

dovecot: Doveadm: Full access via timing oracle attack in credential verification (important)

DOCUMENTATION: A flaw was found in Doveadm, a component of Dovecot. An attacker can exploit a timing oracle vulnerability during the direct comparison of credentials. This allows the attacker to determine the configured credentials, potentially leading to full unauthorized access to the affected component.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.4
-
3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
C
H
U
-
C
H
U
-

Related Resources

No items found.

References

https://access.redhat.com/security/cve/CVE-2026-27856

Severity

0

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
0
EPSS Probability
0.00029%
EPSS Percentile
0.08682%
Introduced Version
0,3.0.0,3.1.0
Fix Available
1:2.3.19.1+dfsg1-2.1+deb12u2,1:2.3.13+dfsg1-2+deb11u3,1:2.4.1+dfsg1-6+deb13u4,1:2.3.21+dfsg1-2ubuntu6.3,1:2.3.16+dfsg1-3ubuntu2.7,2.4.3,2.3.22.1,3.0.5,3.1.4,2.4.3-r0,1:2.3.20-1.amzn2023.0.3,1:2.2.36-6.amzn2.1.3

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