HTTP Request Smuggling Affecting libnghttp2-14 package, versions <1.64.0-160000.4.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.2% (11th percentile)

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  • Snyk IDSNYK-SLES1600-LIBNGHTTP214-18000554
  • published17 Jul 2026
  • disclosed10 Jul 2026

Introduced: 10 Jul 2026

NewCVE-2026-58055  (opens in a new tab)
CWE-444  (opens in a new tab)

How to fix?

Upgrade SLES:16.0.0 libnghttp2-14 to version 1.64.0-160000.4.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libnghttp2-14 package and not the libnghttp2-14 package as distributed by SLES. See How to fix? for SLES:16.0.0 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1