How severe is CVE-2024-51502?

CVE-2024-51502 has a CVSS 4.0 base score of 5.1, rated medium severity.

Is CVE-2024-51502 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2024-51502?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-51502 have an EU (EUVD) identifier?

Yes. CVE-2024-51502 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3214.

When was CVE-2024-51502 published?

CVE-2024-51502 was published on 2024-11-04 and last updated on 2026-06-17.

CVE-2024-51502

CVE-2024-51502 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-755.

Key facts

Severity: Medium (CVSS 4.0 base score 5.1)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-3214
Weakness: CWE-755
Published: 2024-11-04
Last modified: 2026-06-17

Description

loona is an experimental, HTTP/1.1 and HTTP/2 implementation in Rust on top of io-uring. `loona-hpack` suffers from the same vulnerability as the original `hpack` as documented in issue #11. All users who try to decode untrusted input using the Decoder are vulnerable to this exploit. This issue has been addressed in release version 0.4.3. All users are advised to upgrade. There are no known workarounds for this vulnerability.

Frequently asked questions

What is CVE-2024-51502?: loona is an experimental, HTTP/1.1 and HTTP/2 implementation in Rust on top of io-uring. `loona-hpack` suffers from the same vulnerability as the original `hpack` as documented in issue #11. All users who try to decode untrusted input using the Decoder are vulnerable to this exploit. This issue has been addressed in release version 0.4.3. All users are advised to upgrade. There are no known workarounds for this vulnerability.
How severe is CVE-2024-51502?: CVE-2024-51502 has a CVSS 4.0 base score of 5.1, rated medium severity.
Is CVE-2024-51502 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2024-51502?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-51502 have an EU (EUVD) identifier?: Yes. CVE-2024-51502 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-3214.
When was CVE-2024-51502 published?: CVE-2024-51502 was published on 2024-11-04 and last updated on 2026-06-17.

References

Other CWE-755 (Improper Handling of Exceptional Conditions) vulnerabilities

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CVE-2021-42141 — Critical (CVSS 9.8): An issue was discovered in Contiki-NG tinyDTLS through 2018-08-30. One incorrect handshake could complete with…
CVE-2023-38406 — Critical (CVSS 9.8): bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow."
CVE-2022-23121 — Critical (CVSS 9.8): This vulnerability allows remote attackers to execute arbitrary code on affected installations of Netatalk.…

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