quic-go: HTTP/3 QPACK Trailer Expansion Memory Exhaustion

Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.

CVE-2026-40898 · CVE overview and exploitation status

EUVD-2026-34312

GHSA-vvgj-x9jq-8cj9

GO-2026-5676

cve-program · CVE-2026-40898

• https://github.com/quic-go/quic-go/security/advisories/GHSA-vvgj-x9jq-8cj9
• https://github.com/quic-go/quic-go/releases/tag/v0.59.1

euvd · EUVD-2026-34312

• https://github.com/quic-go/quic-go/security/advisories/GHSA-vvgj-x9jq-8cj9
• https://github.com/quic-go/quic-go/releases/tag/v0.59.1

nvd · CVE-2026-40898

• https://github.com/quic-go/quic-go/releases/tag/v0.59.1
• https://github.com/quic-go/quic-go/security/advisories/GHSA-vvgj-x9jq-8cj9

osv · GHSA-vvgj-x9jq-8cj9

• https://github.com/quic-go/quic-go/security/advisories/GHSA-vvgj-x9jq-8cj9
• https://nvd.nist.gov/vuln/detail/CVE-2026-40898
• https://github.com/quic-go/quic-go/pull/5642
• https://github.com/quic-go/quic-go/commit/c56e8c79d1627cc1ed6005b421b4b0adadd83665
• https://github.com/advisories/GHSA-g754-hx8w-x2g6
• https://github.com/quic-go/quic-go
• https://github.com/quic-go/quic-go/releases/tag/v0.59.1

osv · GO-2026-5676

• https://github.com/quic-go/quic-go/security/advisories/GHSA-vvgj-x9jq-8cj9
• https://github.com/quic-go/quic-go/commit/c56e8c79d1627cc1ed6005b421b4b0adadd83665
• https://github.com/quic-go/quic-go/pull/5642
• https://github.com/advisories/GHSA-g754-hx8w-x2g6
• https://github.com/quic-go/quic-go/releases/tag/v0.59.1

• quic-go is an implementation of the QUIC protocol in Go. Prior to version 0.59.1, an attacker can cause excessive memory allocation in quic-go's HTTP/3 client and server implementations by sending a QPACK-encoded HEADERS frame that decodes … · Advisory content revised · 15 Nov 2026