CVE-2022-31394
CVSS v3
7.5
HIGH
EPSS Score
1.1 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2023-02-21
Frequently asked questions
What is CVE-2022-31394?
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.
Is CVE-2022-31394 actively exploited?
Active exploitation of CVE-2022-31394 has not been confirmed. Its EPSS score was 1.1% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2022-31394?
CVE-2022-31394 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2022-31394 affecting your environment?
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