CVE-2026-1521: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-8gqc-w5g5-j344
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CVSS 5.3
CWE-404
Published
Advisory Summary

CVE-2026-1521 is a MODERATE (CVSS 5.3) security vulnerability vulnerability (CWE-404: Improper Resource Shutdown or Release) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not release or incorrectly releases a resource before it is made available for re-use.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-1521 at a Glance

CVE Identifier CVE-2026-1521
GHSA Identifier GHSA-8gqc-w5g5-j344
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-404: Improper Resource Shutdown or Release
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:N/I:N/A:L).

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 None (C:N)
Integrity None (I:N)
Availability Low (A:L)

How to Fix CVE-2026-1521

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-2026-1521, 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-404: Improper Resource Shutdown or Release, where the product does not release or incorrectly releases a resource before it is made available for re-use. 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 security flaw has been discovered in Open5GS up to 2.7.6. This affects the function sgwc_s5c_handle_bearer_resource_failure_indication of the file src/sgwc/s5c-handler.c of the component SGWC. Performing a manipulation results in denial of service. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The patch is named 69b53add90a9479d7960b822fc60601d659c328b. It is recommended to apply a patch to fix this issue.

References

NVD — CVE-2026-1521 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1521
Software Source Repository REPOSITORY
https://github.com/open5gs/open5gs/issues/4268
Software Source Repository REPOSITORY
https://github.com/open5gs/open5gs/issues/4268#event-21989483261
Software Source Repository REPOSITORY
https://github.com/open5gs/open5gs/issues/4268#issue-3795012861
Security Fix Commit FIX COMMIT
https://github.com/open5gs/open5gs/commit/69b53add90a9479d7960b822fc60601d659c328b
Software Source Repository REPOSITORY
https://github.com/open5gs/open5gs
vuldb.com/ WEB
https://vuldb.com/?ctiid.343192
vuldb.com/ WEB
https://vuldb.com/?id.343192
vuldb.com/ WEB
https://vuldb.com/?submit.738370

Frequently Asked Questions

What is CVE-2026-1521?
CVE-2026-1521 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-404: Improper Resource Shutdown or Release.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-1521?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-1521?
CVE-2026-1521 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:N/I:N/A:L.
What CWE is associated with CVE-2026-1521?
CVE-2026-1521 is classified under CWE-404: Improper Resource Shutdown or Release (The product does not release or incorrectly releases a resource before it is made available for re-use.).
How can I check Maven dependencies for CVE-2026-1521?
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 
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  "schema_version" : "1.4.0",
  "id" : "GHSA-8gqc-w5g5-j344",
  "modified" : "2026-02-23T09:31:22Z",
  "published" : "2026-01-28T15:31:31Z",
  "aliases" : [ "CVE-2026-1521" ],
  "details" : "A security flaw has been discovered in Open5GS up to 2.7.6. This affects the function sgwc_s5c_handle_bearer_resource_failure_indication of the file src/sgwc/s5c-handler.c of the component SGWC. Performing a manipulation results in denial of service. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The patch is named 69b53add90a9479d7960b822fc60601d659c328b. It is recommended to apply a patch to fix this issue.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/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" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-1521"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/open5gs/open5gs/issues/4268"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/open5gs/open5gs/issues/4268#event-21989483261"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/open5gs/open5gs/issues/4268#issue-3795012861"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/open5gs/open5gs/commit/69b53add90a9479d7960b822fc60601d659c328b"
  }, {
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  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?ctiid.343192"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?id.343192"
  }, {
    "type" : "WEB",
    "url" : "https://vuldb.com/?submit.738370"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-404" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-01-28T15:16:17Z"
  }
}