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SUSE nghttp2 Moderate HTTP Smuggling Risk Advisory 2026-2883-1

suse
Calendar Grey July 13, 2026
Dist Suse Esm H88
A security update has been released for nghttp2 addressing a moderate issue related to HTTP smuggling risks. Install now.
An update that solves one vulnerability can now be installed.

Summary

## This update for nghttp2 fixes the following issue * CVE-2026-58055: HTTP/1.1 Upgrade request can lead to HTTP request smuggling and cross-client response-queue poisoning (bsc#1269489). ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Micro for Rancher 5.4 zypper in -t patch SUSE-SLE-Micro-5.4-2026-2883=1 * SUSE Linux Enterprise Micro 5.4 zypper in -t patch SUSE-SLE-Micro-5.4-2026-2883=1 * SUSE Linux Enterprise Micro for Rancher 5.3 zypper in -t patch SUSE-SLE-Micro-5.3-2026-2883=1 * SUSE Linux Enterprise Micro 5.3 zypper in -t patch SUSE-SLE-Micro-5.3-2026-2883=1 * SUSE Linux Enterprise Micro 5.5

Topics%20covered

Topics Covered

security advisory moderate SuSE http smuggling nghttp2 cross client response

References

* bsc#1269489

Cross-

* CVE-2026-58055

CVSS scores:

* CVE-2026-58055 ( SUSE ): 6.3

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2026-58055 ( SUSE ): 5.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

* CVE-2026-58055 ( NVD ): 6.3

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

* CVE-2026-58055 ( NVD ): 5.4 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Affected Products:

* SUSE Linux Enterprise Micro 5.3

* SUSE Linux Enterprise Micro 5.4

* SUSE Linux Enterprise Micro 5.5

Severity
moderate
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:2883-1
Release Date: 2026-07-13T09:54:51Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate SuSE http smuggling nghttp2 cross client response

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