The SPDY/2 codec in Facebook Proxygen before 2015-11-09 truncates a certain field to two bytes, which allows hijacking and injection attacks.
https://groups.google.com/forum/#%21topic/facebook-proxygen/K8wCXbW4ihs
Source: Mitre, NVD
Published: 2017-04-10
Updated: 2026-05-13
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
Severity: High
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity: Critical
EPSS: 0.00486