Description
proxygen's QPACK decoder enforced its size limit on a string literal in an encoder-stream instruction only after the entire literal had been received. A remote, unauthenticated HTTP/3 peer could send an insert instruction on the QPACK encoder stream that declares an arbitrarily large literal and then keep sending data, causing the decoder to buffer it without bound for the lifetime of the connection and exhaust memory, leading to denial of service. The issue occurs regardless of the advertised QPACK dynamic table capacity, including when the dynamic table is disabled. This issue affects proxygen versions prior to v2026.11.09.00.
Published: 2026-11-11
Score: n/a
EPSS: n/a
KEV: No
AI Analysis

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Remediation

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History

Wed, 11 Nov 2026 17:00:00 +0000

Type Values Removed Values Added
Description proxygen's QPACK decoder enforced its size limit on a string literal in an encoder-stream instruction only after the entire literal had been received. A remote, unauthenticated HTTP/3 peer could send an insert instruction on the QPACK encoder stream that declares an arbitrarily large literal and then keep sending data, causing the decoder to buffer it without bound for the lifetime of the connection and exhaust memory, leading to denial of service. The issue occurs regardless of the advertised QPACK dynamic table capacity, including when the dynamic table is disabled. This issue affects proxygen versions prior to v2026.11.09.00.
References

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cve-icon MITRE

Status: PUBLISHED

Assigner: Meta

Published:

Updated: 2026-11-11T16:54:58.688Z

Reserved: 2026-10-29T17:01:32.523Z

Link: CVE-2026-119235

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-11-11T17:17:16.663

Modified: 2026-11-11T17:17:16.760

Link: CVE-2026-119235

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses

No weakness.