CVE-2026-58055: nghttp2 through 1.69.0 (inclusive), 0 through 1.69.0

CVE-2026-58055. CVSS 3.1 base score 5.4 (MEDIUM, Vendor/CNA). EPSS 0.00253 (percentile 0.15949), scored 24-Oct-2026.

Affected technology

nghttp2 · through 1.69.0 (inclusive)
nghttp2

nghttp2 · 0 through 1.69.0
nghttp2

Description’s affected range: 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

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Vendor/CNA’s CVSS 4.0 assessment (base score 6.3/10) rates confidentiality and integrity impact as low; availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 25-Oct-2026 19:52 UTC

CWE: CWE-444
CCR priority: 21.7 /100 (P4)
CVSS 3.1: 5.4 /10 · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N · Vendor/CNA
EPSS: 0.00253 · percentile 0.16649 · 2026-10-25
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-25 19:52:47.952465+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-25 19:51:06.643138+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-58055.html