How severe is CVE-2024-36121?

CVE-2024-36121 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity high, and availability none.

Is CVE-2024-36121 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-36121?

CVE-2024-36121 affects Netty Netty-incubator-codec-ohttp. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-36121?

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

Does CVE-2024-36121 have an EU (EUVD) identifier?

Yes. CVE-2024-36121 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2051.

When was CVE-2024-36121 published?

CVE-2024-36121 was published on 2024-06-04 and last updated on 2026-06-17.

CVE-2024-36121

CVE-2024-36121 is a medium-severity vulnerability in Netty Netty-incubator-codec-ohttp with a CVSS 3.x base score of 5.9. 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-190.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-2051
Weakness: CWE-190
Affected product: Netty Netty-incubator-codec-ohttp
Published: 2024-06-04
Last modified: 2026-06-17

Description

netty-incubator-codec-ohttp is the OHTTP implementation for netty. BoringSSLAEADContext keeps track of how many OHTTP responses have been sent and uses this sequence number to calculate the appropriate nonce to use with the encryption algorithm. Unfortunately, two separate errors combine which would allow an attacker to cause the sequence number to overflow and thus the nonce to repeat.

Frequently asked questions

What is CVE-2024-36121?: netty-incubator-codec-ohttp is the OHTTP implementation for netty. BoringSSLAEADContext keeps track of how many OHTTP responses have been sent and uses this sequence number to calculate the appropriate nonce to use with the encryption algorithm. Unfortunately, two separate errors combine which would allow an attacker to cause the sequence number to overflow and thus the nonce to repeat.
How severe is CVE-2024-36121?: CVE-2024-36121 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity high, and availability none.
Is CVE-2024-36121 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-36121?: CVE-2024-36121 affects Netty Netty-incubator-codec-ohttp. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-36121?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-36121 have an EU (EUVD) identifier?: Yes. CVE-2024-36121 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2051.
When was CVE-2024-36121 published?: CVE-2024-36121 was published on 2024-06-04 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:netty:netty-incubator-codec-ohttp:*:*:*:*:*:*:*:*

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