Detections
Analytics

Echo: authlib: security update to 1.6.6+echo.1

high Tenable Self-Hosted Container Security Plugin ID 461513

Description

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

 - Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a
 cryptographic padding oracle vulnerability was identified in the Authlib Python library concerning the
 implementation of the JSON Web Encryption (JWE) RSA1_5 key management algorithm. Authlib registers RSA1_5
 in its default algorithm registry without requiring explicit opt-in, and actively destroys the constant-
 time Bleichenbacher mitigation that the underlying cryptography library implements correctly. This issue
 has been patched in version 1.6.9. (CVE-2026-28490)

Solution

Update the authlib library and its related packages to version 1.6.6+echo.1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-28490

Plugin Details

Severity: High

ID: 461513

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/3/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 52.04

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.8

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

CVSS Score Source: CVE-2026-28490

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

CVSS v4

Risk Factor: High

Base Score: 8.3

Threat Score: 6.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/19/2026

Vulnerability Publication Date: 3/16/2026

Reference Information

CVE: CVE-2026-28490