Apache Thrift: Unbounded line buffer growth in C++ THttpTransport
Summary
Apache Thrift versions before 0.25.0 are affected. The C++ THttpTransport grows its line buffer without bound, which is linked to a heap-based buffer overflow, integer overflow and missing resource limits (CWE-122, CWE-190, CWE-770). According to the supplied CVSS v4.0 vector (9.2, Critical), a remote attacker could potentially exhaust resources or corrupt memory without authentication or user interaction, provided a network-reachable Thrift service uses this code path. The NVD status is Deferred and the vector has not been verified against NVD.
Affected
- Apache Thrift before 0.25.0 (according to the CVE record, affected range 0 to < 0.25.0)
- Likely the C++ binding using the HTTP transport (THttpTransport); not confirmed by the advisory
- Distribution packages: versions below the distro-specific fixed package, e.g. thrift less than 0.25.0-1 (Azure Linux)
Fixed in
- Apache Thrift 0.25.0 (released 2 October 2026)
- Distribution packages: use the fixed package version from your distribution's tracker
Workaround
- Unknown. The CVE record and vendor sources provide no workaround.
- Restricting network access to Thrift endpoints until patching is a possible interim measure, but it is not a vendor-confirmed fix.
Exploitation
- CISA SSVC: Exploitation none, Automatable no, Technical Impact total
- No confirmed exploitation in the wild and no public proof-of-concept known at the time of research
- Not listed in the CISA KEV catalog according to a third-party aggregator (to be verified against the official catalog)
Our recommendation
- Inventory all Thrift usage, including system packages, containers, bundled libraries and third-party products.
- Update to Apache Thrift 0.25.0 or the fixed distribution package.
- Restrict network access to any Thrift endpoint until the fix is applied.
- Ask software vendors whether their products use Thrift and whether a fixed build is available.
- Monitor for exploitation indicators and check the NVD entry once analysis is complete.
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
- OpenCVE: CVE-2026-83632 app.opencve.io
- SUSE CVE via Vulners: CVE-2026-83632 vulners.com
- SecurityOnline: Apache Thrift 0.25.0 vulnerabilities securityonline.info
- Strix: CVE-2026-83632 www.strix.ai
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 31 Oct 2026, 04:55.
Original description (NVD)
Allocation of resources without limits or throttling, Integer overflow or wraparound, Heap-based buffer overflow vulnerability in Apache Thrift. 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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