--- id: CVE-2026-35469 title: spdystream is a Go library for multiplexing streams over SPDY connections summary: >- spdystream is a Go library for multiplexing streams over SPDY connections. In versions 0.5.0 and below, the SPDY/3 frame parser does not validate attacker-controlled counts and lengths before allocating memory. Three allocation paths are… severity: medium cvss: 6.5 cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H' cwe: - CWE-770 vendor: moby product: spdystream affected: - spdystream < 0.5.1 published: '2026-04-16' updated: '2026-09-11' sourceUpdated: '2026-09-11T13:17:46.747' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-35469' references: - url: 'https://github.com/moby/spdystream/releases/tag/v0.5.1' label: security-advisories@github.com - url: 'https://github.com/moby/spdystream/security/advisories/GHSA-pc3f-x583-g7j2' label: security-advisories@github.com - url: 'https://access.redhat.com/errata/RHSA-2026:11070' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:11217' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:12118' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13791' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: 'https://access.redhat.com/errata/RHSA-2026:13829' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - 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url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2457729' label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c - url: >- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-35469.json label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c tags: - nvd - cve.org - score-dispute ssvc: exploitation: none automatable: 'yes' technicalImpact: partial timestamp: '2026-04-17T12:37:18.505269Z' scores: nvd: 6.5 cna: 8.7 epss: 0.00787 epssPercentile: 0.54268 ingestedAt: '2026-07-01T09:50:45.494Z' --- ## Overview spdystream is a Go library for multiplexing streams over SPDY connections. In versions 0.5.0 and below, the SPDY/3 frame parser does not validate attacker-controlled counts and lengths before allocating memory. Three allocation paths are affected: the SETTINGS frame entry count, the header count in parseHeaderValueBlock, and individual header field sizes — all read as 32-bit integers and used directly as allocation sizes with no bounds checking. Because SPDY header blocks are zlib-compressed, a small on-the-wire payload can decompress into large attacker-controlled values. A remote peer that can send SPDY frames to a service using spdystream can exhaust process memory and cause an out-of-memory crash with a single crafted control frame. This issue has been fixed in version 0.5.1. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.