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Apache Thrift CVE-2026-66053

| EUVDEUVD-2026-49159 MEDIUM
Improper Validation of Certificate with Host Mismatch (CWE-297)
2026-07-24 GHSA-hwrj-9rr4-24xh
Apache Python Information Disclosure Thrift Red Hat Suse
5.9
CVSS 3.1 · Vendor
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Severity by source

Vendor (CNA) PRIMARY
5.9 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI
6.8 MEDIUM

Network-based, high attack complexity (requires MITM), user interaction needed, no privileges, scope unchanged, high confidentiality and integrity impact.

3.1 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
4.0 AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
5.9 MEDIUM
qualitative

Primary rating from Vendor (CNA).

CVSS VectorVendor

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

3
Patch available
Jul 27, 2026 - 12:16 EUVD
Analysis Generated
Jul 26, 2026 - 12:10 vuln.today
CVE Published
Jul 24, 2026 - 22:55 oss-security
CRITICAL

Description PRE-NVD

Disclosed via oss-security. NVD scoring and full description are pending.

AnalysisAI

Hostname verification missing in Apache Thrift Python TSSLSocket before 0.24.0 enables man-in-the-middle impersonation, allowing interception and manipulation of RPC traffic. This flaw violates TLS certificate hostname matching, effectively letting an attacker with a valid certificate for any domain present as a legitimate server. No active exploitation or public exploit code is known.

Technical ContextAI

Apache Thrift's Python bindings include TSSLSocket, a TLS-wrapped socket implementing the Thrift transport layer. The vulnerability arises from the hostname verification logic being either absent or broken when importing the TSSLSocket module, causing connections to accept any TLS certificate regardless of the target hostname. This is an improper certificate validation (CWE-295) specifically affecting the Python language binding. CPE data would typically refer to apache:thrift:<0.24.0 for Python packages.

RemediationAI

Upgrade to Apache Thrift 0.24.0, which includes the fix for hostname verification. Monitor the official Apache Thrift security page (https://thrift.apache.org/) for updates. If immediate upgrade is not possible, restrict Thrift RPC clients to trusted networks where MITM attacks are infeasible, or enforce certificate pinning at the transport layer, though these are temporary workarounds and have operational overhead.

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 12 Not-Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 15 SP7 Not-Affected

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CVE-2026-66053 vulnerability details – vuln.today
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