Detections
Analytics

Echo: libsoup3: security update to 3.6.6-1+e4

medium Tenable Self-Hosted Container Security Plugin ID 457778

Description

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

 - A flaw was found in libsoup’s caching mechanism, SoupCache, where the HTTP Vary header is ignored when
 evaluating cached responses. This header ensures that responses vary appropriately based on request
 headers such as language or authentication. Without this check, cached content can be incorrectly reused
 across different requests, potentially exposing sensitive user information. While the issue is unlikely to
 affect everyday desktop use, it could result in confidentiality breaches in proxy or multi-user
 environments. (CVE-2025-9901)

Solution

Update the libsoup3 library and its related packages to version 3.6.6-1+e4 or later.

See Also

https://advisory.echohq.com/cve/CVE-2025-9901

Plugin Details

Severity: Medium

ID: 457778

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.72

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

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

CVSS Score Source: CVE-2025-9901

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

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

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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 6/1/2026

Vulnerability Publication Date: 9/3/2025

Reference Information

CVE: CVE-2025-9901