How severe is CVE-2026-46452?

CVE-2026-46452 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-46452 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-46452?

CVE-2026-46452 affects Apache Nimble. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-46452?

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

When was CVE-2026-46452 published?

CVE-2026-46452 was published on 2026-07-24 and last updated on 2026-07-27.

CVE-2026-46452

CVE-2026-46452 is a medium-severity vulnerability in Apache Nimble with a CVSS 3.x base score of 5.3. 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-20.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apache Nimble
Published: 2026-07-24
Last modified: 2026-07-27

Description

Improper Input Validation vulnerability in Apache NimBLE in Mesh Proxy SAR reassembly could result in passing broken data toward application resulting in memory pressure and unstable parsing behavior. This issue affects Apache NimBLE: through 1.9.0. Users are recommended to upgrade to version 1.10.0, which fixes the issue.

Frequently asked questions

What is CVE-2026-46452?: Improper Input Validation vulnerability in Apache NimBLE in Mesh Proxy SAR reassembly could result in passing broken data toward application resulting in memory pressure and unstable parsing behavior. This issue affects Apache NimBLE: through 1.9.0. Users are recommended to upgrade to version 1.10.0, which fixes the issue.
How severe is CVE-2026-46452?: CVE-2026-46452 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-46452 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-46452?: CVE-2026-46452 affects Apache Nimble. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-46452?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-46452 published?: CVE-2026-46452 was published on 2026-07-24 and last updated on 2026-07-27.

References

Affected products (1)

cpe:2.3:a:apache:nimble:*:*:*:*:*:*:*:*

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