DEBIAN-CVE-2026-1299

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Source
https://security-tracker.debian.org/tracker/CVE-2026-1299
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-1299
Upstream
Downstream
Published
2026-01-23T17:16:12.977Z
Modified
2026-02-10T11:17:09.895158Z
Severity
  • 6.0 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
[none]
Details

The email module, specifically the "BytesGenerator" class, didn’t properly quote newlines for email headers when serializing an email message allowing for header injection when an email is serialized. This is only applicable if using "LiteralHeader" writing headers that don't respect email folding rules, the new behavior will reject the incorrectly folded headers in "BytesGenerator".

References

Affected packages

Debian:11
pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source

Affected ranges

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

Affected versions

7.*
7.3.5+dfsg-2
7.3.5+dfsg-2+deb11u1
7.3.5+dfsg-2+deb11u2
7.3.5+dfsg-2+deb11u3
7.3.5+dfsg-2+deb11u4
7.3.5+dfsg-2+deb11u5
7.3.6~rc2+dfsg-1
7.3.6~rc2+dfsg-2
7.3.6+dfsg-1
7.3.7+dfsg-1
7.3.7+dfsg-2
7.3.7+dfsg-3
7.3.7+dfsg-4
7.3.7+dfsg-5
7.3.8~rc1+dfsg-1
7.3.8~rc1+dfsg-2
7.3.8+dfsg-1
7.3.8+dfsg-2
7.3.9+dfsg-1
7.3.9+dfsg-2
7.3.9+dfsg-3
7.3.9+dfsg-4
7.3.9+dfsg-5
7.3.10~rc3+dfsg-1
7.3.10~rc3+dfsg-2
7.3.10+dfsg-1
7.3.11+dfsg-1
7.3.11+dfsg-2
7.3.12~rc1+dfsg-1
7.3.12~rc2+dfsg-1
7.3.12+dfsg-1
7.3.13+dfsg-1
7.3.14+dfsg-1
7.3.15+dfsg-1
7.3.16+dfsg-1
7.3.16+dfsg-2
7.3.17+dfsg-1
7.3.17+dfsg-2
7.3.17+dfsg-3
7.3.18+dfsg-1
7.3.18+dfsg-2
7.3.19+dfsg-1
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json"
python3.9

Package

Name
python3.9
Purl
pkg:deb/debian/python3.9?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.9.2-1+deb11u5

Affected versions

3.*
3.9.2-1
3.9.2-1+deb11u1
3.9.2-1+deb11u2
3.9.2-1+deb11u3
3.9.2-1+deb11u4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json"
Debian:12
pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source

Affected ranges

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

Affected versions

7.*
7.3.11+dfsg-2
7.3.11+dfsg-2+deb12u1
7.3.11+dfsg-2+deb12u2
7.3.11+dfsg-2+deb12u3
7.3.12~rc1+dfsg-1
7.3.12~rc2+dfsg-1
7.3.12+dfsg-1
7.3.13+dfsg-1
7.3.14+dfsg-1
7.3.15+dfsg-1
7.3.16+dfsg-1
7.3.16+dfsg-2
7.3.17+dfsg-1
7.3.17+dfsg-2
7.3.17+dfsg-3
7.3.18+dfsg-1
7.3.18+dfsg-2
7.3.19+dfsg-1
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json"
python3.11

Package

Name
python3.11
Purl
pkg:deb/debian/python3.11?arch=source

Affected ranges

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

Affected versions

3.*
3.11.2-6
3.11.2-6+deb12u1
3.11.2-6+deb12u2
3.11.2-6+deb12u3
3.11.2-6+deb12u4
3.11.2-6+deb12u5
3.11.2-6+deb12u6
3.11.3-1
3.11.3-2
3.11.4-1
3.11.5-1
3.11.5-2
3.11.5-3
3.11.6-1
3.11.6-2
3.11.6-3~hurd.2
3.11.6-3
3.11.7-1
3.11.7-2
3.11.8-1
3.11.8-1.1~exp1
3.11.8-1.1~exp2
3.11.8-2
3.11.8-3
3.11.8-3+hurd.1
3.11.9-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json"
Debian:13
pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source

Affected ranges

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

Affected versions

7.*
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json"
python3.13

Package

Name
python3.13
Purl
pkg:deb/debian/python3.13?arch=source

Affected ranges

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

Affected versions

3.*
3.13.5-2
3.13.6-1
3.13.7-1
3.13.8-1
3.13.9-1
3.13.11-1
3.13.12-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json"
Debian:14
pypy3

Package

Name
pypy3
Purl
pkg:deb/debian/pypy3?arch=source

Affected ranges

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

Affected versions

7.*
7.3.19+dfsg-2
7.3.20+dfsg-1
7.3.20+dfsg-2
7.3.20+dfsg-3
7.3.20+dfsg-4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json"
python3.13

Package

Name
python3.13
Purl
pkg:deb/debian/python3.13?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.13.12-1

Affected versions

3.*
3.13.5-2
3.13.6-1
3.13.7-1
3.13.8-1
3.13.9-1
3.13.11-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json"
python3.14

Package

Name
python3.14
Purl
pkg:deb/debian/python3.14?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.14.3-1

Affected versions

3.*
3.14.0~a7-1
3.14.0~b1-1
3.14.0~b2-1
3.14.0~b3-1
3.14.0~b4-1
3.14.0~rc1-1
3.14.0~rc2-1
3.14.0~rc3-1
3.14.0-1
3.14.0-2
3.14.0-3
3.14.0-4
3.14.0-5
3.14.2-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-1299.json"