CVE-2026-9497Network attack vector

Authenticated class instantiation via unsafe AutoType parsing

Published May 25, 2026 · Updated May 25, 2026

Unsafe deserialization in changmingxie tcc-transaction 2.0 through 2.1.0 allows remote authenticated users to instantiate classes. The recovery path reads stored transaction JSON from Redis and passes attacker-controlled @type metadata to Fastjson.parseObject with AutoType enabled. Access to write transaction state through the REST API or Redis is required, after which recovery processing creates the selected class inside the service.

CVSS severity6.3
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unsafe deserialization in changmingxie tcc-transaction 2.0 through 2.1.0 allows remote authenticated users to instantiate classes. The recovery path reads stored transaction JSON from Redis and passes attacker-controlled @type metadata to Fastjson.parseObject with AutoType enabled. Access to write transaction state through the REST API or Redis is required, after which recovery processing creates the selected class inside the service.

The record

CVE
CVE-2026-9497
Published
May 25, 2026
Updated
May 25, 2026
Vendor
changmingxie
Product
tcc-transaction
Classifications
CWE-20, CWE-502, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 25, 2026CVE publishedPublication date reported by the CVE source.
  2. May 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0
  2. Affected versionversion=2.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

changmingxie · tcc-transactionversion=2.0; version=2.1.0

Published CVSS scores

6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS: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
6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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