CVE-2026-3099: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-hrf3-6c7v-5628
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CVSS 5.8
CWE-323
Published
Advisory Summary

CVE-2026-3099 is a MODERATE (CVSS 5.8) security vulnerability vulnerability (CWE-323: Reusing a Nonce, Key Pair in Encryption) affecting Software libraries in the Maven ecosystem. The weakness occurs when nonces should be used for the present occasion and only once.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-3099 at a Glance

CVE Identifier CVE-2026-3099
GHSA Identifier GHSA-hrf3-6c7v-5628
Severity MODERATE
CVSS v3.1 Base Score 5.8
CWE Classification CWE-323: Reusing a Nonce, Key Pair in Encryption
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.8

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:R/S:C/C:L/I:L/A:L).

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

How to Fix CVE-2026-3099

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-2026-3099, 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-323: Reusing a Nonce, Key Pair in Encryption, where nonces should be used for the present occasion and only once. 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

A flaw was found in Libsoup. The server-side digest authentication implementation in the SoupAuthDomainDigest class does not properly track issued nonces or enforce the required incrementing nonce-count (nc) attribute. This vulnerability allows a remote attacker to capture a single valid authentication header and replay it repeatedly. Consequently, the attacker can bypass authentication and gain unauthorized access to protected resources, impersonating the legitimate user.

References

NVD — CVE-2026-3099 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3099
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-3099
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2442232
gitlab.gnome.org/gnome/libsoup/-/iss... WEB
https://gitlab.gnome.org/GNOME/libsoup/-/issues/495

Frequently Asked Questions

What is CVE-2026-3099?
CVE-2026-3099 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-323: Reusing a Nonce, Key Pair in Encryption.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-3099?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-3099?
CVE-2026-3099 has a CVSS v3.1 base score of 5.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L.
What CWE is associated with CVE-2026-3099?
CVE-2026-3099 is classified under CWE-323: Reusing a Nonce, Key Pair in Encryption (Nonces should be used for the present occasion and only once.).
How can I check Maven dependencies for CVE-2026-3099?
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-hrf3-6c7v-5628",
  "modified" : "2026-03-12T15:30:25Z",
  "published" : "2026-03-12T15:30:25Z",
  "aliases" : [ "CVE-2026-3099" ],
  "details" : "A flaw was found in Libsoup. The server-side digest authentication implementation in the SoupAuthDomainDigest class does not properly track issued nonces or enforce the required incrementing nonce-count (nc) attribute. This vulnerability allows a remote attacker to capture a single valid authentication header and replay it repeatedly. Consequently, the attacker can bypass authentication and gain unauthorized access to protected resources, impersonating the legitimate user.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:L"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-3099"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-3099"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2442232"
  }, {
    "type" : "WEB",
    "url" : "https://gitlab.gnome.org/GNOME/libsoup/-/issues/495"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-323" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-03-12T14:16:18Z"
  }
}