How severe is CVE-2023-36660?

CVE-2023-36660 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-36660 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-36660?

CVE-2023-36660 affects Nettle Project Nettle. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-36660?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2023-36660 published?

CVE-2023-36660 was published on 2023-06-25 and last updated on 2026-06-17.

CVE-2023-36660

CVE-2023-36660 is a critical-severity vulnerability in Nettle Project Nettle with a CVSS 3.x base score of 9.8. 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-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 1% (59th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Nettle Project Nettle
Published: 2023-06-25
Last modified: 2026-06-17

Description

The OCB feature in libnettle in Nettle 3.9 before 3.9.1 allows memory corruption.

Frequently asked questions

What is CVE-2023-36660?: The OCB feature in libnettle in Nettle 3.9 before 3.9.1 allows memory corruption.
How severe is CVE-2023-36660?: CVE-2023-36660 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-36660 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (59th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-36660?: CVE-2023-36660 affects Nettle Project Nettle. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-36660?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2023-36660 published?: CVE-2023-36660 was published on 2023-06-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nettle_project:nettle:3.9:*:*:*:*:*:*:*

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