CVE-2026-47085: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-8jrh-wq6h-53c4
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CVSS 4.0
CWE-340
Published
Advisory Summary

CVE-2026-47085 is a MODERATE (CVSS 4.0) security vulnerability vulnerability (CWE-340: Generation of Predictable Numbers or Identifiers) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses a scheme that generates numbers or identifiers that are more predictable than required.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-47085 at a Glance

CVE Identifier CVE-2026-47085
GHSA Identifier GHSA-8jrh-wq6h-53c4
Severity MODERATE
CVSS v3.1 Base Score 4.0
CWE Classification CWE-340: Generation of Predictable Numbers or Identifiers
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 4.0

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

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

How to Fix CVE-2026-47085

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-2026-47085, 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-340: Generation of Predictable Numbers or Identifiers, where the product uses a scheme that generates numbers or identifiers that are more predictable than required. 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

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH token forgery can occur via a missing mboxkey. If an attacker knew a folder name on the victim's account for which the victim had never issued an auth URL, they could forge a working URLAUTH token by computing an HMAC-SHA1 value with a predictable key, giving them read access to the mailbox. (URLAUTH is an obscure feature, meaning that the odds of any user actually being susceptible to this attack are very low. Perhaps no public clients use URLAUTH.)

References

NVD — CVE-2026-47085 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47085
www.cyrusimap.org/3.12/imap/download/... WEB
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html
www.cyrusimap.org/imap/download/relea... WEB
https://www.cyrusimap.org/imap/download/release-notes/index.html

Frequently Asked Questions

What is CVE-2026-47085?
CVE-2026-47085 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-340: Generation of Predictable Numbers or Identifiers.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-47085?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-47085?
CVE-2026-47085 has a CVSS v3.1 base score of 4.0 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N.
What CWE is associated with CVE-2026-47085?
CVE-2026-47085 is classified under CWE-340: Generation of Predictable Numbers or Identifiers (The product uses a scheme that generates numbers or identifiers that are more predictable than required.).
How can I check Maven dependencies for CVE-2026-47085?
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-8jrh-wq6h-53c4",
  "modified" : "2026-07-16T21:30:36Z",
  "published" : "2026-07-16T21:30:36Z",
  "aliases" : [ "CVE-2026-47085" ],
  "details" : "An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH token forgery can occur via a missing mboxkey. If an attacker knew a folder name on the victim's account for which the victim had never issued an auth URL, they could forge a working URLAUTH token by computing an HMAC-SHA1 value with a predictable key, giving them read access to the mailbox. (URLAUTH is an obscure feature, meaning that the odds of any user actually being susceptible to this attack are very low. Perhaps no public clients use URLAUTH.)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47085"
  }, {
    "type" : "WEB",
    "url" : "https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html"
  }, {
    "type" : "WEB",
    "url" : "https://www.cyrusimap.org/imap/download/release-notes/index.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-340" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-16T19:16:49Z"
  }
}