DEBIAN-CVE-2026-42007

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Source
https://security-tracker.debian.org/tracker/CVE-2026-42007
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42007.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-42007
Upstream
  • CVE-2026-42007
Published
2026-08-28T12:16:29Z
Modified
2026-09-28T20:00:41Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H CVSS Calculator
Summary
[none]
Details

An attacker that has valid credentials can use a Sieve script with the editheader extension to trigger a use-after-free in the mail editing code, and to write memory contents beyond the intended buffer into the delivered mail. This causes memory leak and opportunity to do memory corruption during mail delivery, which can crash the delivery process and may allow execution of arbitrary code in the context of that process. Disable the Sieve editheader extension. Update to non-vulnerable version. No publicly available exploits are known.

References

Affected packages

Debian:12 / dovecot

Package

Name
dovecot
Purl
pkg:deb/debian/dovecot?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

1:2.*
1:2.3.19.1+dfsg1-2.1
1:2.3.19.1+dfsg1-2.1+deb12u1
1:2.3.19.1+dfsg1-2.1+deb12u2
1:2.3.19.1+dfsg1-2.1+deb12u3
1:2.3.19.1+dfsg1-2.1+deb12u4
1:2.3.19.1+dfsg1-2.1+deb12u5
1:2.3.19.1+dfsg1-2.1+deb12u6
1:2.3.20+dfsg1-1
1:2.3.21+dfsg1-1
1:2.3.21+dfsg1-2
1:2.3.21+dfsg1-3~bpo12+1
1:2.3.21+dfsg1-3
1:2.3.21.1+dfsg1-1~bpo12+1
1:2.3.21.1+dfsg1-1
1:2.4.0+dfsg1-1~exp1
1:2.4.0+dfsg1-1~exp2
1:2.4.0+dfsg1-1~exp3
1:2.4.0+dfsg1-1~exp4
1:2.4.0+dfsg1-1~exp5
1:2.4.0+dfsg1-1~exp6
1:2.4.1+dfsg1-1~exp1
1:2.4.1+dfsg1-1~exp2
1:2.4.1+dfsg1-1
1:2.4.1+dfsg1-2
1:2.4.1+dfsg1-3
1:2.4.1+dfsg1-4
1:2.4.1+dfsg1-5
1:2.4.1+dfsg1-6~exp1
1:2.4.1+dfsg1-6
1:2.4.1+dfsg1-7
1:2.4.1+dfsg1-8
1:2.4.1+dfsg1-9
1:2.4.2+dfsg1-1
1:2.4.2+dfsg1-2
1:2.4.2+dfsg1-3
1:2.4.2+dfsg1-4
1:2.4.3+dfsg1-1
1:2.4.3+dfsg1-2
1:2.4.4+dfsg1-1
1:2.4.4+dfsg1-2
1:2.4.5+dfsg1-1
1:2.4.5+dfsg1-2
1:2.4.5+dfsg1-3

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42007.json"

Debian:13 / dovecot

Package

Name
dovecot
Purl
pkg:deb/debian/dovecot?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1:2.4.1+dfsg1-6+deb13u7

Affected versions

1:2.*
1:2.4.1+dfsg1-6
1:2.4.1+dfsg1-6+deb13u1
1:2.4.1+dfsg1-6+deb13u2
1:2.4.1+dfsg1-6+deb13u3
1:2.4.1+dfsg1-6+deb13u4
1:2.4.1+dfsg1-6+deb13u5
1:2.4.1+dfsg1-6+deb13u6

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42007.json"

Debian:14 / dovecot

Package

Name
dovecot
Purl
pkg:deb/debian/dovecot?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1:2.4.5+dfsg1-1

Affected versions

1:2.*
1:2.4.1+dfsg1-6
1:2.4.1+dfsg1-7
1:2.4.1+dfsg1-8
1:2.4.1+dfsg1-9
1:2.4.2+dfsg1-1
1:2.4.2+dfsg1-2
1:2.4.2+dfsg1-3
1:2.4.2+dfsg1-4
1:2.4.3+dfsg1-1
1:2.4.3+dfsg1-2
1:2.4.4+dfsg1-1
1:2.4.4+dfsg1-2

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42007.json"