CVE-2026-100677: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-v7jg-f6q5-rwc7
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CVSS 5.3
CWE-209
Published
Advisory Summary

CVE-2026-100677 is a MODERATE (CVSS 5.3) security vulnerability vulnerability (CWE-209: Generation of Error Message Containing Sensitive Information) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product generates an error message that includes sensitive information about its environment, users, or associated data.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-100677 at a Glance

CVE Identifier CVE-2026-100677
GHSA Identifier GHSA-v7jg-f6q5-rwc7
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-209: Generation of Error Message Containing Sensitive Information
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.3

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

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

How to Fix CVE-2026-100677

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

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

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-100677, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software 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 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-209: Generation of Error Message Containing Sensitive Information, where the product generates an error message that includes sensitive information about its environment, users, or associated data. In Software, 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

stoatchat before 0.15.5 contains an account enumeration vulnerability in the login endpoint that exposes source file locations in error responses. Unauthenticated attackers can distinguish between registered and unregistered email addresses by comparing error location fields returned from POST /api/auth/session/login requests.

References

GitHub Advisory / Wiki ADVISORY
https://github.com/stoatchat/stoatchat/security/advisories/GHSA-h44h-xx2j-hp56
NVD — CVE-2026-100677 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-100677
www.vulncheck.com/advisories/stoatcha... WEB
https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-account-enumeration-via-error-location

Frequently Asked Questions

What is CVE-2026-100677?
CVE-2026-100677 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-209: Generation of Error Message Containing Sensitive Information.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-100677?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-100677?
CVE-2026-100677 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-100677?
CVE-2026-100677 is classified under CWE-209: Generation of Error Message Containing Sensitive Information (The product generates an error message that includes sensitive information about its environment, users, or associated data.).
How can I check Maven dependencies for CVE-2026-100677?
Run the dependency tree command: 'mvn dependency:tree'. 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-v7jg-f6q5-rwc7",
  "modified" : "2026-09-26T15:31:20Z",
  "published" : "2026-09-26T15:31:20Z",
  "aliases" : [ "CVE-2026-100677" ],
  "details" : "stoatchat before 0.15.5 contains an account enumeration vulnerability in the login endpoint that exposes source file locations in error responses. Unauthenticated attackers can distinguish between registered and unregistered email addresses by comparing error location fields returned from POST /api/auth/session/login requests.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/stoatchat/stoatchat/security/advisories/GHSA-h44h-xx2j-hp56"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-100677"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/stoatchat-before-0.15.5-account-enumeration-via-error-location"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-209" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-26T14:16:51Z"
  }
}