CVE-2018-6346

HIGHNVD 7.57.5—

7.5

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.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 56.5%
KEV: Not listed

Published

December 31, 2018

Last Modified

May 6, 2025

References (2)

cve-assign@fbhttps://github.com/facebook/proxygen/commit/52cf331743ebd74194d6343a6c2ec52bb917c982
af854a3a-2127-422b-91ae-364da2661108https://github.com/facebook/proxygen/commit/52cf331743ebd74194d6343a6c2ec52bb917c982

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 16× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-23 02:44 UTCEG score recompute
2026-05-23 02:44 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2018-6346?

CVE-2018-6346 is a high vulnerability published on December 31, 2018. 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.

When was CVE-2018-6346 disclosed?

CVE-2018-6346 was first published in the National Vulnerability Database on December 31, 2018, with the most recent update on May 6, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-6346 actively exploited?

CVE-2018-6346 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 56.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-6346?

CVE-2018-6346 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2018-6346?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-6346, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2018-6346

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-6346?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)