CVE-2022-31394

HIGHNVD 7.57.5—Elevated

7.5

Hyperium Hyper before 0.14.19 does not allow for customization of the max_header_list_size method in the H2 third-party software, allowing attackers to perform HTTP2 attacks.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 57.6%
KEV: Not listed

Published

February 21, 2023

Last Modified

March 17, 2025

References (6)

cve@mitrehttps://github.com/hyperium/hyper/compare/v0.14.18...v0.14.19
cve@mitrehttps://github.com/hyperium/hyper/issues/2826
cve@mitrehttps://github.com/hyperium/hyper/pull/2828
af854a3a-2127-422b-91ae-364da2661108https://github.com/hyperium/hyper/compare/v0.14.18...v0.14.19
af854a3a-2127-422b-91ae-364da2661108https://github.com/hyperium/hyper/issues/2826
af854a3a-2127-422b-91ae-364da2661108https://github.com/hyperium/hyper/pull/2828

Weakness Classification(1)

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

CWE-770Allocation of Resources Without Limits or Throttling

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2022-313942023-02-27
Hyperium Hyper before 0.14.19 does not allow for customization of the max_header_list_size method in the H2 third-party software allowing attackers to perform HTTP2 attacks.

Data Freshness Timeline

(refreshed 15× in last 7d / 20× 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
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Frequently asked(5)

What is CVE-2022-31394?

CVE-2022-31394 is a high vulnerability published on February 21, 2023. Hyperium Hyper before 0.14.19 does not allow for customization of the maxheaderlist_size method in the H2 third-party software, allowing attackers to perform HTTP2 attacks.

When was CVE-2022-31394 disclosed?

CVE-2022-31394 was first published in the National Vulnerability Database on February 21, 2023, with the most recent update on March 17, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2022-31394 actively exploited?

CVE-2022-31394 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 57.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2022-31394?

CVE-2022-31394 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2022-31394?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-31394, 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-2022-31394

Published

Last Modified

References (6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2022-31394?

Same vendor

Same CWE

CVE-2022-31394

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2022-31394?

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References (6)

Frequently asked(5)

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