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Known vulnerabilities in Facebook Proxygen

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CVE Summary Score Published
CVE-2026-91096 In proxygen from v2024.10.28.00 until v2026.09.28.00, WebTransportImpl::terminateSessionStreams… 7.5 High Sep 28, 2026
CVE-2026-91095 In proxygen from v2024.10.28.00 until v2026.09.28.00, the HTTPTransaction::onWebTransportUniStream and… 5.3 Medium Sep 28, 2026
CVE-2026-84895 In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after… 7.3 High Sep 28, 2026
CVE-2026-44909 Proxygen lacked a generalized slow-consumer detection mechanism in its core HTTP session layer 7.5 High Jul 23, 2026
CVE-2025-55181 Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite loop in… 5.3 Medium Dec 2, 2025
CVE-2021-24029 A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a… Not rated Mar 15, 2021
CVE-2020-1897 A use-after-free is possible due to an error in lifetime management in the request adaptor when a malicious client… Not rated May 18, 2020
CVE-2019-11940 In the course of decompressing HPACK inside the HTTP2 protocol, an unexpected sequence of header table resize operations… Not rated Dec 4, 2019
CVE-2019-11921 An out of bounds write is possible via a specially crafted packet in certain configurations of Proxygen due to… Not rated Jul 25, 2019
CVE-2018-6347 An issue in the Proxygen handling of HTTP2 parsing of headers/trailers can lead to a denial-of-service attack 7.5 High Dec 31, 2018
CVE-2018-6346 A potential denial-of-service issue in the Proxygen handling of invalid HTTP2 priority settings (specifically a circular… 7.5 High Dec 31, 2018
CVE-2018-6343 Proxygen fails to validate that a secondary auth manager is set before dereferencing it 7.5 High Dec 31, 2018

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