Detections
Analytics

Echo: nghttp2: security update to 1.64.0-1.1+e2

medium Tenable Cloud Security Plugin ID 463700

Description

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

 - nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content-
 Length header and body onto reusable keep-alive backend connections, re-adding the Upgrade and Connection
 headers while passing Content-Length verbatim. A backend that resolves the resulting ambiguous message in
 the attacker's favor enables HTTP request/response smuggling and cross-client response-queue poisoning.
 (CVE-2026-58055)

Solution

Update the nghttp2 library and its related packages to version 1.64.0-1.1+e2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-58055

Plugin Details

Severity: Medium

ID: 463700

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.62

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3.1

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

CVSS Score Source: CVE-2026-58055

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.9

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

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

CVSS v4

Risk Factor: Medium

Base Score: 6.3

Threat Score: 2.9

Threat Vector: CVSS:4.0/E:P

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/29/2026

Vulnerability Publication Date: 6/28/2026

Reference Information

CVE: CVE-2026-58055