---
cve: "CVE-2026-1496"
severity: "CRITICAL"
cvss: 9.3
epss: "0.5%"
vendor: "Black Duck"
kev: false
exploited: false
published: "2026-03-27 15:16:48"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-27T08:36:12+01:00"
---

# CVE-2026-1496

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

Vulnerable versions of Coverity Connect lack an error handler in the authentication logic for command line tooling that makes it vulnerable to an authentication bypass. A malicious actor with access to the /token API endpoint that either knows or guesses a valid username, can use this in a specially crafted HTTP request to bypass authentication. Successful exploitation allows the malicious actor to assume all roles and privileges granted to the valid user’s Coverity Connect account.

## CNA-Record (Kanon, cvelistV5)

- CNA: **BlackDuck**
- State: PUBLISHED
- Stand: 2026-03-27 14:36:04
- CNA-CVSS: **9.3** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **none**
  - Automatable: **yes**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Schwachstellen-Klasse

- **CWE-639** — Authorization Bypass Through User-Controlled Key
  The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data.

## Referenzen

- <https://community.blackduck.com/s/article/Black-Duck-Security-Advisory-CVE-2026-1496>
- <https://community.blackduck.com/s/article/Instructions-on-how-to-block-token-endpoint-for-Coverity-Connect>
- <https://community.blackduck.com/s/article/WAF-IDS-IPS-Mitigation-Guidance>
- <https://github.com/blackduck-inc/Coverity-Usage-Log-Analyzer>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-1496/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_