Detections
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Echo: libsoup3: security update to 3.6.6-1+e12

high Tenable Self-Hosted Container Security Plugin ID 473743

Description

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

 - A flaw was found in libsoup. The chunked transfer encoding parser uses a permissive parsing function for
 chunk sizes that silently accepts inputs violating RFC 9112, including leading whitespace, plus sign
 prefixes, and trailing invalid characters. When libsoup operates behind a strict frontend proxy, this
 parsing differential can be exploited to smuggle HTTP requests. (CVE-2026-66338)

Solution

Update the libsoup3 library and its related packages to version 3.6.6-1+e12 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-66338

Plugin Details

Severity: High

ID: 473743

Version: Revision 1.1

Type: Local

Published: 10/8/2026

Updated: 10/8/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.51

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 5

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

CVSS Score Source: CVE-2026-66338

CVSS v3

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.5

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

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/25/2026

Vulnerability Publication Date: 7/24/2026

Reference Information

CVE: CVE-2026-66338