MEDIUM 5.4 Microsoft

CVE-2026-58055

nghttp2 nghttpx - HTTP Request/Response Smuggling via Upgrade Request with Content-Length

Microsoft Security Update 2026-Jun: nghttp2 nghttpx - HTTP Request/Response Smuggling via Upgrade Request with Content-Length

Affected Products

azl3 fluent-bit 3.1.10-6 on Azure Linux 3.0
azl3 rust 1.75.0-30 on Azure Linux 3.0
azl3 nghttp2 1.61.0-3 on Azure Linux 3.0
azl3 rust 1.90.0-9 on Azure Linux 3.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58055
https://nvd.nist.gov/vuln/detail/CVE-2026-58055

Published: 2026-06-09 · Source: Microsoft · Feed updated: 2026-08-14

This medium severity vulnerability with a CVSS score of 5.4 was published on 2026-06-09 via Microsoft. Affected: azl3 fluent-bit 3.1.10-6 on Azure Linux 3.0, azl3 rust 1.75.0-30 on Azure Linux 3.0, azl3 nghttp2 1.61.0-3 on Azure Linux 3.0 and 1 more.

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