Vulnerability · Published Jul 27, 2026 · Assigned by apache
CVE-2026-66053Apache Thrift: Python TSSLSocket Hostname Matcher Import
Medium 5.9
In plain English
A medium-severity security flaw in Apache Thrift from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.3%top 78.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | thrift | no fix listed | DEBIAN-CVE-2026-66053 |
| Debian:13 | thrift | no fix listed | DEBIAN-CVE-2026-66053 |
| Debian:14 | thrift | 0.23.0-3 | DEBIAN-CVE-2026-66053 |
| PyPI | thrift | 0.24.0 | PYSEC-2026-3927 |
| PyPI | thrift | 0.24.0 | GHSA-hwrj-9rr4-24xh |
| Ubuntu:22.04:LTS | thrift | no fix listed | UBUNTU-CVE-2026-66053 |
| Ubuntu:24.04:LTS | thrift | no fix listed | UBUNTU-CVE-2026-66053 |
| Ubuntu:26.04:LTS | thrift | no fix listed | UBUNTU-CVE-2026-66053 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Thrift | 0 – before 0.24.0 |
Weakness: CWE-297 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
References
- https://lists.apache.org/thread/7v3jhgwfbmhx42424phydlnzb109g8b9 vendor-advisory
- https://lists.apache.org/thread/w4k5dnv1x58knwlhpo9x0or5xh220y65 vendor-advisory