DEBIAN-CVE-2026-69249

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Source
https://security-tracker.debian.org/tracker/CVE-2026-69249
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-69249.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-69249
Upstream
Published
2026-08-03T22:16:52Z
Modified
2026-09-11T08:47:33Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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

python-cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In versions 42.0.0 through 48.0.0, when resolving invalid certificate chains that include duplicate copies of self-signed certificates, the processing recursively invokes the same candidate, leading to an exponential blowup. Although the limitation that the chain depth cannot exceed a specified maximum depth prevents unbounded recursion and guarantees termination, an attacker-controlled certificate chain can lead the processing to easily take more than 5s to reject in testing. This amplification could form the basis for a resource exhaustion denial of service attack. The core issue arises in the recursive nature of build_chain_inner, which does not de-duplicate against previously analyzed candidates. As the correctness of validation is not affected, the integrity of a system cannot be compromised through this vector, only its availability. This issue is fixed in 49.0.0.

References

Affected packages

Debian:12 / python-cryptography

Package

Name
python-cryptography
Purl
pkg:deb/debian/python-cryptography?arch=source&distro=bookworm

Affected ranges

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

Affected versions

38.*
38.0.4-3
38.0.4-3+deb12u1
38.0.4-4
41.*
41.0.7-1
41.0.7-2
41.0.7-3
41.0.7-4
41.0.7-5
42.*
42.0.5-1
42.0.5-2
43.*
43.0.0-1
43.0.0-2
43.0.0-3
44.*
44.0.2-1
44.0.2-2
45.*
45.0.6-1~exp1
45.0.6-1
45.0.7-1
46.*
46.0.1-1~exp1
46.0.1-1
46.0.5-1
46.0.5-2
46.0.6-1
46.0.7-1
47.*
47.0.0-1
49.*
49.0.0-1~exp1
49.0.0-1
49.0.0-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-69249.json"

Debian:13 / python-cryptography

Package

Name
python-cryptography
Purl
pkg:deb/debian/python-cryptography?arch=source&distro=trixie

Affected ranges

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

Affected versions

43.*
43.0.0-3
43.0.0-3+deb13u1
44.*
44.0.2-1
44.0.2-2
45.*
45.0.6-1~exp1
45.0.6-1
45.0.7-1
46.*
46.0.1-1~exp1
46.0.1-1
46.0.5-1
46.0.5-2
46.0.6-1
46.0.7-1
47.*
47.0.0-1
49.*
49.0.0-1~exp1
49.0.0-1
49.0.0-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-69249.json"

Debian:14 / python-cryptography

Package

Name
python-cryptography
Purl
pkg:deb/debian/python-cryptography?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
49.0.0-1

Affected versions

43.*
43.0.0-3
44.*
44.0.2-1
44.0.2-2
45.*
45.0.6-1~exp1
45.0.6-1
45.0.7-1
46.*
46.0.1-1~exp1
46.0.1-1
46.0.5-1
46.0.5-2
46.0.6-1
46.0.7-1
47.*
47.0.0-1
49.*
49.0.0-1~exp1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-69249.json"