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Fencer Intel
no cvss —

CVE-2026-119235 json

proxygen's QPACK decoder enforced its size limit on a string literal in an encoder-stream instruction only after the entire literal had bee…

published 17h ago modified 17h ago also EUVD-2026-123605

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
—
no EPSS score yet
public exploits
0
none known

Summary

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.

Patch / fix

  • Facebook proxygen v2026.11.09.00

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Affected products

  • Facebook proxygen

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.