CVE-2018-6332

5.9 mediumEPSS 1.1%

Medium (5.9) in facebook hhvm. EPSS 1.1% chance of exploitation in the next 30 days.

A potential denial-of-service issue in the Proxygen handling of invalid HTTP2 settings which can cause the server to spend disproportionate resources. This affects all supported versions of HHVM (3.24.3 and 3.21.7 and below) when using the proxygen server to handle HTTP2 requests.

Severity

CVSS 3.1

5.9 medium

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

EPSS: 1.1% chance of exploitation in the next 30 days; higher than 65% of CVEs (scores of 2026-10-31)
CWEs: CWE-19, CWE-400
Published: 2018-12-03
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

facebook:hhvm

References

https://hhvm.com/blog/2018/03/15/hhvm-3.25.html
https://hhvm.com/blog/2018/03/15/hhvm-3.25.html

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