An issue was discovered in Barrier before 2.3.4.
Priority LOW 36CWE-787Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
An issue was discovered in Barrier before 2.3.4. An attacker can cause memory exhaustion in the barriers component (aka the server-side implementation of Barrier) and barrierc by sending long TCP messages.
Why it matters now
EPSS 0.01575 75th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:barrier_project:barrier:*:*:*:*:*:*:*:* | before 2.3.4 | Vulnerable | Barrier Project |
- cpe:2.3:a:barrier_project:barrier:*:*:*:*:*:*:*:* Versions before 2.3.4 Vulnerable ·Barrier Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-42076
- 2026-10-03 Alias added: GHSA-g73p-h925-4x6w
References
More Barrier Project Barrier vulnerabilities
- TI-2021-18581 An issue was discovered in Barrier before 2.4.0. CVSS 3.1HIGH 8.8
- TI-2021-18582 An issue was discovered in Barrier before 2.4.0. CVSS 3.1HIGH 8.2
- TI-2021-18584 An issue was discovered in Barrier before 2.3.4. CVSS 3.1HIGH 7.5
- TI-2021-18583 An issue was discovered in Barrier before 2.3.4. CVSS 3.1HIGH 7.5
Sources
- CVE-2021-42076 · CVE Program
- CVE-2021-42076 · NVD
- FIRST EPSS
- GHSA-g73p-h925-4x6w · GitHub Advisory Database · CC BY 4.0
- CVE-2021-42076 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences