Apache Thrift D bindings: Denial of service via truncated HTTP request
Summary
The D language bindings of Apache Thrift contain several flaws, including an uncaught exception, an infinite loop and an integer underflow. A truncated HTTP request stops the server of the D library, which allows an unauthenticated remote attacker to cause a denial of service. The issue only matters where a Thrift server written with the D bindings is reachable from untrusted networks.
Affected
- Apache Thrift D language bindings, versions before 0.25.0 (per the Apache CVE record: affected 0 to < 0.25.0)
Fixed in
- Upgrade to Apache Thrift 0.25.0 (released 2026-09-30)
- Distribution packages: check your vendor's tracker, as fixed package versions were not confirmed for all distributions
Workaround
- Unknown from the vendor.
- Generic option (not from the vendor, not tested): filter malformed or excessively truncated HTTP requests at a reverse proxy or firewall, e.g. by limiting request size and validating HTTP syntax, before they reach the Thrift server
Exploitation
- CISA SSVC: exploitation none, automatable yes, technical impact partial
- No known exploitation in the wild found in the research
- No public proof of concept found (this does not prove that none exists)
- EPSS 0.00553 (Tenable)
- CISA KEV status not checked
Our recommendation
- Inventory applications that use Thrift D bindings, including vendor software that bundles them, and ask vendors for their status
- Upgrade to Apache Thrift 0.25.0 where possible; this release also fixes related D issues such as CVE-2026-85494
- If an upgrade is not possible soon, restrict network access to the Thrift service and filter truncated HTTP requests at a reverse proxy or firewall
- Monitor for service crashes or hangs of Thrift servers
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Apache Thrift mailing list thread 1 lists.apache.org
- Apache Thrift mailing list thread 2 lists.apache.org
- OSV: BIT-thrift-2026-86537 osv.dev
- Apache Thrift download page thrift.apache.org
- Apache Thrift CHANGES.md apache.googlesource.com
- Tenable CVE-2026-86537 www.tenable.com
- OpenCVE CVE-2026-86537 app.opencve.io
- openSUSE SUSE-CVE CVE-2026-86537 (Vulners) vulners.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 05:55.
Original description (NVD)
Uncaught exception, Loop with unreachable exit condition ('infinite loop'), Integer underflow (wrap or wraparound) vulnerability in Apache Thrift D language bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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