CVE-2018-6346 | BDVDB-2026-111140 Detail

FacebookProxygen

Description#

A potential denial-of-service issue in the Proxygen handling of invalid HTTP2 priority settings (specifically a circular dependency). This affects Proxygen prior to v2018.12.31.00.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact high. Attack vector: network.

Weaknesses#

CWE-400 Uncontrolled Resource Consumption

References#

https://github.com/facebook/proxygen/commit/52cf331743ebd74194d6343a6c2ec52bb917c982

Exploit#

No public exploit known

History#

Version 12018-12-31Record published in the CVE List.
Version 22025-05-06Most recent update recorded in the CVE List.

Published

Published: 2018-12-31
Last modified: 2025-05-06

Vendor information

Vendor: Facebook
Product: Proxygen

All Facebook vulnerabilities

Score

7.5 High

EPSS

1.3%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 72.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Denial of Service

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
v2018.12.31.00
Fixed
Not stated
Vulnerable
< v2018.12.31.00
Fixed
v2018.12.31.00

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.5 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	None
Integrity	None
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).