Vulnerability · Published Oct 2, 2026 · Assigned by apache
CVE-2026-94634Apache Thrift: Python `TJSONProtocol` has a string length limit that is off by default
High 8.2
In plain English
A high-severity resource allocation without limits 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 20% of all known vulnerabilities).
Severity (CVSS 4.0)8.2High
Exploit odds (30 days)0.3%top 79.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Allocation of resources without limits or throttling, Initialization of a resource with an insecure default vulnerability in Apache Thrift Python bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | thrift | no fix listed | DEBIAN-CVE-2026-94634 |
| Debian:13 | thrift | no fix listed | DEBIAN-CVE-2026-94634 |
| Debian:14 | thrift | no fix listed | DEBIAN-CVE-2026-94634 |
| Ubuntu:22.04:LTS | thrift | no fix listed | UBUNTU-CVE-2026-94634 |
| Ubuntu:24.04:LTS | thrift | no fix listed | UBUNTU-CVE-2026-94634 |
| Ubuntu:26.04:LTS | thrift | no fix listed | UBUNTU-CVE-2026-94634 |
| Ubuntu:26.10 | thrift | no fix listed | UBUNTU-CVE-2026-94634 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Thrift | 0 – before 0.25.0 |
Weakness: CWE-770, CWE-1188 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
References
- https://lists.apache.org/thread/33otcgbqd27wf6qq810q56znzbomnhg1 vendor-advisory
- https://lists.apache.org/thread/dgy8ox9t4bh1xhf74ovf29ht87x7dno4 vendor-advisory