DEBIAN-CVE-2026-40685

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Source
https://security-tracker.debian.org/tracker/CVE-2026-40685
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40685.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-40685
Upstream
  • CVE-2026-40685
Published
2026-04-30T22:16:25Z
Modified
2026-09-14T17:03:33Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header, because of an incorrect implementation of \ skipping.

References

Affected packages

Debian:12 / exim4

Package

Name
exim4
Purl
pkg:deb/debian/exim4?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.96-15+deb12u9

Affected versions

4.*
4.96-15
4.96-15+deb12u1
4.96-15+deb12u2
4.96-15+deb12u3
4.96-15+deb12u4
4.96-15+deb12u5
4.96-15+deb12u6
4.96-15+deb12u7
4.96-15+deb12u8

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40685.json"

Debian:13 / exim4

Package

Name
exim4
Purl
pkg:deb/debian/exim4?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.98.2-1+deb13u2

Affected versions

4.*
4.98.2-1
4.98.2-1+deb13u1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40685.json"

Debian:14 / exim4

Package

Name
exim4
Purl
pkg:deb/debian/exim4?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.99.2-1

Affected versions

4.*
4.98.2-1
4.98.2-1+hurd.1
4.98.2-2
4.99~RC1-1
4.99~RC2-1
4.99~RC3-1
4.99~RC3-2
4.99-1
4.99-2
4.99-3
4.99-4~bpo13+1
4.99-4
4.99-5
4.99-6~bpo13+1
4.99-6
4.99-7~bpo13+1
4.99-7
4.99.1-1~bpo13+1
4.99.1-1
4.99.1-2
4.99.1-3
4.99.1-4
4.99.1-5
4.99.1-6
4.99.2-1~bpo13+1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40685.json"