Detections
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SCA: security update for h2 (GHSA-847f-9342-265h)

medium Tenable Cloud Security Plugin ID 435091

Description

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

 - h2 is a pure-Python implementation of a HTTP/2 protocol stack. Prior to version 4.3.0, an HTTP/2 request
 splitting vulnerability allows attackers to perform request smuggling attacks by injecting CRLF characters
 into headers. This occurs when servers downgrade HTTP/2 requests to HTTP/1.1 without properly validating
 header names/values, enabling attackers to manipulate request boundaries and bypass security controls.
 This issue has been patched in version 4.3.0. (CVE-2025-57804)

See Also

https://github.com/advisories/GHSA-847f-9342-265h

Plugin Details

Severity: Medium

ID: 435091

Version: Revision 1.11

Type: Local

Family: SCA Checks

Published: 8/26/2025

Updated: 7/2/2026

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

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2025-57804

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 6.9

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:N/SC:N/SI:L/SA:N

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/25/2025

Vulnerability Publication Date: 8/25/2025

Reference Information

CVE: CVE-2025-57804

cwe: CWE-93