CVE-2026-9497: Tcc transaction TCC-TRANSACTION Has An Improper Input Vulnerability

LOW
Advisory Identifier: GHSA-4r4v-3jc5-hrg9
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CVSS 6.3
CWE-20
Published
Advisory Summary

CVE-2026-9497 is a LOW (CVSS 6.3) tcc-transaction has an improper input vulnerability (CWE-20: Improper Input Validation) affecting Tcc transaction libraries in the Maven ecosystem. The issue involves tcc-transaction has an improper input validation vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2026-9497 at a Glance

CVE Identifier CVE-2026-9497
GHSA Identifier GHSA-4r4v-3jc5-hrg9
Severity LOW
CVSS v3.1 Base Score 6.3
CWE Classification CWE-20: Improper Input Validation
Affected Product Tcc transaction
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-9497

To remediate this vulnerability, upgrade all affected Tcc transaction dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.mengyun:tcc-transaction fixed: Latest secure release 
<dependency>
    <groupId>org.mengyun</groupId>
    <artifactId>tcc-transaction</artifactId>
    <version>Latest secure release</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.mengyun

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-9497, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.mengyun

Analyze the terminal output to locate any version of Tcc transaction in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.mengyun command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Tcc transaction, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-9497 Affected Tcc transaction Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
org.mengyun:tcc-transaction
maven/org.mengyun/tcc-transaction
Maven
≤ 2.1.0

References

NVD — CVE-2026-9497 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9497
Tcc transaction Source Repository REPOSITORY
https://github.com/Ku4D3/bug_story/blob/main/report_01.md
Tcc transaction Source Repository REPOSITORY
https://github.com/changmingxie/tcc-transaction
vuldb.com/submit/814092 WEB
https://vuldb.com/submit/814092
vuldb.com/vuln/365480 WEB
https://vuldb.com/vuln/365480
vuldb.com/vuln/365480/cti WEB
https://vuldb.com/vuln/365480/cti

Frequently Asked Questions

What is CVE-2026-9497?
CVE-2026-9497 is a security vulnerability in Tcc transaction involving TCC-TRANSACTION has an Improper Input Validation vulnerability under CWE-20: Improper Input Validation.
Which Tcc transaction versions are affected?
Affected versions include releases prior to current release patches across affected packages: org.mengyun:tcc-transaction.
What version fixes CVE-2026-9497?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is tcc-transaction affected?
Yes, org.mengyun:tcc-transaction is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2026-9497?
CVE-2026-9497 has a CVSS v3.1 base score of 6.3 (LOW) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2026-9497?
CVE-2026-9497 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check Maven dependencies for CVE-2026-9497?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.mengyun'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-4r4v-3jc5-hrg9",
  "modified" : "2026-06-30T17:37:10Z",
  "published" : "2026-05-26T13:30:50Z",
  "aliases" : [ "CVE-2026-9497" ],
  "summary" : "TCC-TRANSACTION has an Improper Input Validation vulnerability",
  "details" : "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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.mengyun:tcc-transaction"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "2.1.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-9497"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Ku4D3/bug_story/blob/main/report_01.md"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/changmingxie/tcc-transaction"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/submit/814092"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/365480"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/vuln/365480/cti"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-30T17:37:10Z",
    "nvd_published_at" : "2026-05-25T20:16:38Z"
  }
}