Proxygen
CVE-2015-7265
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Access control enforcement
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. EPSS exploitation probability: 0.35%. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system. |
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Alert meAnalysisAI
Facebook Proxygen before 2015-11-09 mismanages HTTPMessage.request state, which allows remote attackers to conduct hijacking attacks and bypass ACL checks. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
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Technical ContextAI · show details
This vulnerability is classified under CWE-284. Facebook Proxygen before 2015-11-09 mismanages HTTPMessage.request state, which allows remote attackers to conduct hijacking attacks and bypass ACL checks. Affected products include: Proxygen Project Proxygen. Version information: before 2015.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionCVE.org
Facebook Proxygen before 2015-11-09 mismanages HTTPMessage.request state, which allows remote attackers to conduct hijacking attacks and bypass ACL checks.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)CVE.org
Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resour
The SPDY/2 codec in Facebook Proxygen before 2015-11-09 truncates a certain field to two bytes, which allows hijacking a
A use-after-free is possible due to an error in lifetime management in the request adaptor when a malicious client invok
In the course of decompressing HPACK inside the HTTP2 protocol, an unexpected sequence of header table resize operations
An out of bounds write is possible via a specially crafted packet in certain configurations of Proxygen due to improper
The SPDY/2 codec in Facebook Proxygen before 2015-11-09 allows remote attackers to conduct hijacking attacks and bypass
Use-after-free in Meta's Proxygen HTTP library (v2024.10.28.00 through v2026.09.28.00) lets remote, unauthenticated atta
A packet of death scenario is possible in mvfst via a specially crafted message during a QUIC session, which causes a cr
An issue in the Proxygen handling of HTTP2 parsing of headers/trailers can lead to a denial-of-service attack. Rated hig
A potential denial-of-service issue in the Proxygen handling of invalid HTTP2 priority settings (specifically a circular
Proxygen fails to validate that a secondary auth manager is set before dereferencing it. Rated high severity (CVSS 7.5),
Use-after-free in Meta's proxygen C++ networking library (versions v2026.04.06.00 up to but not including v2026.09.28.00
GitHub PoC
Exploit-DB