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  4. CVE 2026 83745 apache thrift apache thrift websocket frame
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Back to active CVEs
High · CVSS 8.7CVE-2026-83745

Apache Thrift, Apache Thrift: WebSocket frame decoders allocate the payload buffer from the declared length, not the bytes received (Node.js, D)

Answer in brief

CVE-2026-83745 records a High severity (CVSS 8.7) vulnerability in Apache Thrift, Apache Thrift: WebSocket frame decoders allocate the payload buffer from the declared length, not the bytes received (Node.js, D). The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/Apache Thrift (generic), Apache Software Foundation/thrift (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 2, 2026Updated Oct 2, 2026Source checked Oct 2, 2026First seen by HOL Oct 2, 2026Material review Oct 2, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/Apache Thrift (generic), Apache Software Foundation/thrift (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Apache Software Foundation/Apache Thriftgeneric>=0 <0.25.00.25.0
Apache Software Foundation/thriftgeneric>=0 <0.25.00.25.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/Apache Thrift, Apache Software Foundation/thrift.
  2. 2Review the reported fix. Update Apache Software Foundation/Apache Thrift to 0.25.0; Apache Software Foundation/thrift to 0.25.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 2, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 2, 2026

Sources and claim methodology

  • Source referencelists.apache.org
  • Source referencelists.apache.org
Upstream source description

Memory allocation with excessive size value, Improper handling of length parameter inconsistency vulnerability in Apache Thrift  nodejs and D lang bindings. Both bindings' WebSocket server transports read the payload length out of the frame header and allocate that many bytes immediately, without checking that the bytes have arrived. A single ~14-byte frame therefore commits as much memory as it cares to declare -- measured at 513 MiB against the Node.js server and 2 GiB against the D transport -- and in the Node.js case the connection is left open afterwards, so the frame can simply be sent again. This issue affects Apache Thrift before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Apache Thrift: C++ THeaderTransport does not enforce configured maxFrameSizeSame apache software foundation/thrift package
  • Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: TJSONProtocol accepts a single JSON string/number exceeding the configured size limit (multi-language)Same apache software foundation/apache thrift package
  • Apache Thrift: c_glib read_message_begin leaves output parameters unset for non-versioned messagesSame apache software foundation/apache thrift package
  • Apache Thrift: Buffered transport reads are not accounted against MaxMessageSizeSame apache software foundation/apache thrift package
  • Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: skip() does not apply the recursion limit (Python accelerator, PHP, Perl, Lua, Smalltalk, OCaml)Same apache software foundation/apache thrift package
  • Apache Thrift: c_glib multiplexed processor crashes on a message it cannot routeSame apache software foundation/apache thrift package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-789, CWE-130
Source
CVE List V5
Source checked
Oct 2, 2026
References
2 linked sources
Open source record