Detections
Analytics

SCA: security update for authlib (GHSA-g7f3-828f-7h7m)

medium Tenable Cloud Security Plugin ID 435575

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 1.6.5,
 Authlib’s JWE zip=DEF path performs unbounded DEFLATE decompression. A very small ciphertext can expand
 into tens or hundreds of megabytes on decrypt, allowing an attacker who can supply decryptable tokens to
 exhaust memory and CPU and cause denial of service. This issue has been patched in version 1.6.5.
 Workarounds for this issue involve rejecting or stripping zip=DEF for inbound JWEs at the application
 boundary, forking and add a bounded decompression guard via decompressobj().decompress(data, MAX_SIZE))
 and returning an error when output exceeds a safe limit, or enforcing strict maximum token sizes and fail
 fast on oversized inputs; combine with rate limiting. (CVE-2025-62706)

See Also

https://github.com/advisories/GHSA-g7f3-828f-7h7m

Plugin Details

Severity: Medium

ID: 435575

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 10/11/2025

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.19

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2025-62706

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/10/2025

Vulnerability Publication Date: 10/10/2025

Reference Information

CVE: CVE-2025-62706