CVE-2019-11921

An out of bounds write is possible via a specially crafted packet in certain configurations of Proxygen due to improper handling of Base64 when parsing malformed binary content in Structured HTTP Headers. This issue affects versions of proxygen prior to v2019.07.22.00.

• CWE-787

• https://github.com/facebook/proxygen/commit/2f07985bef9fbae124cc63e5c0272e32da4fdaecPatch, Third Party Advisory
• https://www.facebook.com/security/advisories/cve-2019-11921Third Party Advisory
• https://github.com/facebook/proxygen/commit/2f07985bef9fbae124cc63e5c0272e32da4fdaecPatch, Third Party Advisory
• https://www.facebook.com/security/advisories/cve-2019-11921Third Party Advisory

Published

Jul 25, 2019

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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