How severe is CVE-2026-66053?

CVE-2026-66053 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 no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-66053 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-66053?

CVE-2026-66053 affects Apache Thrift. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-66053?

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

When was CVE-2026-66053 published?

CVE-2026-66053 was published on 2026-07-27.

CVE-2026-66053

CVE-2026-66053 is a medium-severity vulnerability in Apache Thrift 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-297.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-297
Affected product: Apache Thrift
Published: 2026-07-27
Last modified: 2026-07-27

Description

Improper Validation of Certificate with Host Mismatch vulnerability in Apache Thrift Python bindings. This issue affects Apache Thrift: before 0.24.0. Users are recommended to upgrade to version 0.24.0, which fixes the issue. This replaces CVE-2026-41603

Frequently asked questions

What is CVE-2026-66053?: Improper Validation of Certificate with Host Mismatch vulnerability in Apache Thrift Python bindings. This issue affects Apache Thrift: before 0.24.0. Users are recommended to upgrade to version 0.24.0, which fixes the issue. This replaces CVE-2026-41603
How severe is CVE-2026-66053?: CVE-2026-66053 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 no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-66053 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-66053?: CVE-2026-66053 affects Apache Thrift. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-66053?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-66053 published?: CVE-2026-66053 was published on 2026-07-27.

References

Affected products (1)

cpe:2.3:a:apache:thrift:*:*:*:*:*:*:*:*

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