Apache Thrift: Integer underflow in C++ THeaderTransport allows denial of service
Summary
Apache Thrift C++ bindings on 32-bit systems contain an integer underflow in THeaderTransport that leads to an out-of-bounds write. A remote, unauthenticated peer can terminate the affected process, which causes a denial of service. The NVD analysis is still deferred, and the CVSS v4.0 base score is 8.2 (HIGH) according to the sources. No exploitation in the wild is known.
Affected
- Apache Thrift C++ before 0.25.0 on 32-bit systems
- 64-bit builds are not described as affected in the sources
- Distribution packages: check your vendor's tracker, as fixed builds vary (Ubuntu lists Needs evaluation; Red Hat Hardened Images list 0.25.0-0.1.hum1)
Fixed in
- Upgrade to Apache Thrift 0.25.0 or later
- Other distribution builds: Unknown.
Workaround
- No workaround is documented by the vendor; the vendor recommends upgrading.
- Until patched, identify 32-bit C++ Thrift builds and restrict network access to Thrift listeners to trusted peers (analyst recommendation, not from a source).
Exploitation
- No evidence of exploitation in the wild found.
- CISA SSVC: Exploitation none, Automatable no, Technical Impact partial.
- No public proof of concept found; this does not prove none exists.
- Not listed in KEV.
Our recommendation
- Inventory C++ Thrift usage and identify any 32-bit builds.
- Restrict exposure of Thrift services to trusted networks.
- Upgrade to Apache Thrift 0.25.0 or later, which also addresses related Thrift issues fixed in the same release; do not patch only for this CVE.
- Verify fixed builds with your distribution's security tracker.
- Monitor for vendor and NVD updates.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Apache Thrift mailing list thread lists.apache.org
- Apache Thrift mailing list thread (2) lists.apache.org
- Ubuntu Security Notice CVE-2026-82459 ubuntu.com
- OSV BIT-thrift-2026-82459 osv.dev
- Red Hat RHSA-2026:74369 (via Vulners) vulners.com
- CERT-EU security advisories 2026 cert.europa.eu
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, 17:22.
Original description (NVD)
Integer underflow (wrap or wraparound), Out-of-bounds write vulnerability in Apache Thrift C++ 32 bit THeaderTransport. 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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