Detections
Analytics

Echo: cryptography: security update to 49.0.0python-cryptography: security update to 1:43.0.0-3+deb13u1+e2

high Tenable Cloud Security Plugin ID 459499

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-69249)

Solution

Update the python-cryptography library and its related packages to version 1:43.0.0-3+deb13u1+e2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-69249

Plugin Details

Severity: High

ID: 459499

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/5/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.61

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-69249

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

Vector: 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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/4/2026

Vulnerability Publication Date: 8/3/2026

Reference Information

CVE: CVE-2026-69249