OESA-2026-2722

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Source

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-2722

Import Source

https://repo.openeuler.org/security/data/osv/OESA-2026-2722.json

JSON Data

https://api.osv.dev/v1/vulns/OESA-2026-2722

Upstream

CVE-2026-33603

CVE-2026-40016

CVE-2026-40020

CVE-2026-42006

Published

2026-06-24T13:12:09Z

Modified

2026-06-24T13:30:09.222732827Z

Summary

dovecot security update

Details

Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats.

Security Fix(es):

Attacker can use a specially crafted base64 exchange between Dovecot and Client to fake SCRAM TLS channel binding. This requires that the attacker is able to position itself between Dovecot and the client connection. If successful, the attacker can eavesdrop communications between Dovecot and client as MITM proxy. Install fixed version. No publicly available exploits are known.(CVE-2026-33603)

Attacker can upload a malicious Sieve script over ManageSieve service (or locally) to bypass configured CPU time limits for Sieve up to 130 times of the configured limit. Attacker can use this to degrade server performance and bypass configured CPU time limits for Sieve scripts. Install fixed version, or alternatively prevent direct access to Sieve scripts via ManageSieve or local access. No publicly available exploits are known.(CVE-2026-40016)

Attacker can use the IMAP SETACL command to inject the anyone permission to user's dovecot-acl file even if imapaclallow_anyone=no. This causes folders to be spammed to all users. The impact is limited to being able to spam folders to other users, no unexpected access is gained. Install to fixed version. No publicly available exploits are known.(CVE-2026-40020)

An attacker can cause uncontrolled memory usage with excessive bracing over IMAP. The fix in CVE-2026-27857 was incomplete, only blocking one way of doing this, so there was still another way left open. In particular, the fix was for closing braces, but you could still use open braces to bypass the limit. Using excessive bracing, attacker can cause memory usage up to configured memory limit. Install fixed version, or configure vsz_limit for imap process to low value. No publicly available exploits are known.(CVE-2026-42006)

Database specific

{
    "severity": "Medium"
}

References

Affected packages

openEuler:24.03-LTS-SP3 / dovecot

Package

Name: dovecot
Purl: pkg:rpm/openEuler/dovecot&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.3.20-5.oe2403sp3

Ecosystem specific

{
    "x86_64": [
        "dovecot-2.3.20-5.oe2403sp3.x86_64.rpm",
        "dovecot-debuginfo-2.3.20-5.oe2403sp3.x86_64.rpm",
        "dovecot-debugsource-2.3.20-5.oe2403sp3.x86_64.rpm",
        "dovecot-devel-2.3.20-5.oe2403sp3.x86_64.rpm",
        "dovecot-help-2.3.20-5.oe2403sp3.x86_64.rpm"
    ],
    "aarch64": [
        "dovecot-2.3.20-5.oe2403sp3.aarch64.rpm",
        "dovecot-debuginfo-2.3.20-5.oe2403sp3.aarch64.rpm",
        "dovecot-debugsource-2.3.20-5.oe2403sp3.aarch64.rpm",
        "dovecot-devel-2.3.20-5.oe2403sp3.aarch64.rpm",
        "dovecot-help-2.3.20-5.oe2403sp3.aarch64.rpm"
    ],
    "src": [
        "dovecot-2.3.20-5.oe2403sp3.src.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-2722.json"

openEuler:20.03-LTS-SP4 / dovecot

Package

Name: dovecot
Purl: pkg:rpm/openEuler/dovecot&distro=openEuler-20.03-LTS-SP4

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.3.15-8.oe2003sp4

Ecosystem specific

{
    "x86_64": [
        "dovecot-2.3.15-8.oe2003sp4.x86_64.rpm",
        "dovecot-debuginfo-2.3.15-8.oe2003sp4.x86_64.rpm",
        "dovecot-debugsource-2.3.15-8.oe2003sp4.x86_64.rpm",
        "dovecot-devel-2.3.15-8.oe2003sp4.x86_64.rpm",
        "dovecot-help-2.3.15-8.oe2003sp4.x86_64.rpm"
    ],
    "aarch64": [
        "dovecot-2.3.15-8.oe2003sp4.aarch64.rpm",
        "dovecot-debuginfo-2.3.15-8.oe2003sp4.aarch64.rpm",
        "dovecot-debugsource-2.3.15-8.oe2003sp4.aarch64.rpm",
        "dovecot-devel-2.3.15-8.oe2003sp4.aarch64.rpm",
        "dovecot-help-2.3.15-8.oe2003sp4.aarch64.rpm"
    ],
    "src": [
        "dovecot-2.3.15-8.oe2003sp4.src.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-2722.json"

openEuler:22.03-LTS-SP4 / dovecot

Package

Name: dovecot
Purl: pkg:rpm/openEuler/dovecot&distro=openEuler-22.03-LTS-SP4

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.3.15-8.oe2203sp4

Ecosystem specific

{
    "x86_64": [
        "dovecot-2.3.15-8.oe2203sp4.x86_64.rpm",
        "dovecot-debuginfo-2.3.15-8.oe2203sp4.x86_64.rpm",
        "dovecot-debugsource-2.3.15-8.oe2203sp4.x86_64.rpm",
        "dovecot-devel-2.3.15-8.oe2203sp4.x86_64.rpm",
        "dovecot-help-2.3.15-8.oe2203sp4.x86_64.rpm"
    ],
    "aarch64": [
        "dovecot-2.3.15-8.oe2203sp4.aarch64.rpm",
        "dovecot-debuginfo-2.3.15-8.oe2203sp4.aarch64.rpm",
        "dovecot-debugsource-2.3.15-8.oe2203sp4.aarch64.rpm",
        "dovecot-devel-2.3.15-8.oe2203sp4.aarch64.rpm",
        "dovecot-help-2.3.15-8.oe2203sp4.aarch64.rpm"
    ],
    "src": [
        "dovecot-2.3.15-8.oe2203sp4.src.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-2722.json"

openEuler:24.03-LTS-SP1 / dovecot

Package

Name: dovecot
Purl: pkg:rpm/openEuler/dovecot&distro=openEuler-24.03-LTS-SP1

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.3.20-5.oe2403sp1

Ecosystem specific

{
    "x86_64": [
        "dovecot-2.3.20-5.oe2403sp1.x86_64.rpm",
        "dovecot-debuginfo-2.3.20-5.oe2403sp1.x86_64.rpm",
        "dovecot-debugsource-2.3.20-5.oe2403sp1.x86_64.rpm",
        "dovecot-devel-2.3.20-5.oe2403sp1.x86_64.rpm",
        "dovecot-help-2.3.20-5.oe2403sp1.x86_64.rpm"
    ],
    "aarch64": [
        "dovecot-2.3.20-5.oe2403sp1.aarch64.rpm",
        "dovecot-debuginfo-2.3.20-5.oe2403sp1.aarch64.rpm",
        "dovecot-debugsource-2.3.20-5.oe2403sp1.aarch64.rpm",
        "dovecot-devel-2.3.20-5.oe2403sp1.aarch64.rpm",
        "dovecot-help-2.3.20-5.oe2403sp1.aarch64.rpm"
    ],
    "src": [
        "dovecot-2.3.20-5.oe2403sp1.src.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-2722.json"