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chore(deps): update module github.com/quic-go/quic-go to v0.59.1 [security] - #2474
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This PR contains the following updates:
v0.57.1→v0.59.1Warning
Some dependencies could not be looked up. Check the Dependency Dashboard for more information.
quic-go: HTTP/3 QPACK Trailer Expansion Memory Exhaustion
CVE-2026-40898 / GHSA-vvgj-x9jq-8cj9
More information
Details
Summary
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 into a large trailer field section with many unique field names and/or large values. The implementation builds an
http.Headerfor the correspondinghttp.Requestorhttp.Response, while only enforcing limits on the size of the QPACK-compressed HEADERS frame, not on the decoded field section. This can lead to memory exhaustion.This is very similar to CVE-2025-64702. The difference is that this issue uses HTTP trailers, rather than HTTP headers, as the attack vector.
Impact
A misbehaving or malicious peer can cause a denial-of-service (DoS) attack against quic-go's HTTP/3 servers or clients by triggering excessive memory allocation, potentially leading to crashes or resource exhaustion. This affects both servers and clients due to symmetric header construction.
Details
In HTTP/3, field sections are compressed using QPACK (RFC 9204). Field sections are used for both HTTP headers and trailers. quic-go's HTTP/3 server and client decode the QPACK-encoded HEADERS frame into header fields, then construct an
http.Requestorhttp.Response.http3.Server.MaxHeaderBytesandhttp3.Transport.MaxResponseHeaderByteslimit the encoded HEADERS frame size, with defaults of 1 MB for servers and 10 MB for clients. However, they did not limit the decoded field section size. A maliciously crafted HEADERS frame carrying trailers can expand to about 50x the encoded size using QPACK static table entries with long names and/or values.RFC 9114 requires endpoints to enforce decoded field section size limits via SETTINGS, which quic-go did not do for trailers.
The Fix
quic-go now enforces RFC 9114 decoded field section size limits for trailers as well. It incrementally decodes QPACK entries and checks the field section size after each entry, aborting the stream if an entry causes the limit to be exceeded.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LReferences
This data is provided by the GitHub Advisory Database (CC-BY 4.0).
Release Notes
quic-go/quic-go (github.com/quic-go/quic-go)
v0.59.1Compare Source
This patch release backports #5642, which adds validation for HTTP/3 trailers.
v0.59.0Compare Source
This release adds a couple of new features:
ReceiveStreamandStream: #5501Breaking Changes
ClientHelloInfo: #5497ConnectionTracingIDandConnectionTracingKey: #5521ConnectionStatenow reports both the local and the remote status of the QUIC Datagram and Reliable Stream Reset extensions: #5533Other Notable Fixes
RecordEventandClose: #5523Changelog
Full Changelog: quic-go/quic-go@v0.58.0...v0.59.0
v0.58.1Compare Source
This patch release backports fixes for a bug in the PTO queueing logic that could lead to an infinite loop of PING packets.
Bug Fixes
v0.58.0Compare Source
This release optimizes the QUIC handshake:
Other notable changes
datagram_idonpacket_sent,packet_receivedandpacket_bufferedevents, using the CRC32 of the packet: #5455Changelog
Full Changelog: quic-go/quic-go@v0.57.0...v0.58.0
Configuration
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