---
cve: "CVE-2026-88880"
severity: "CRITICAL"
cvss: 9.2
epss: "0.5%"
vendor: "mend"
kev: false
exploited: false
published: "2026-09-10 13:05:31"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-09T13:22:02+02:00"
---

# CVE-2026-88880

> 9.2 CRITICAL · 🧪 PoC

## Beschreibung

Renovate before 44.11.3 fails to validate Link header destinations when following GitLab server pagination, allowing malicious servers to redirect credential-bearing requests. Attackers controlling a compromised GitLab server can specify a Link header pointing to attacker-controlled infrastructure to exfiltrate authentication credentials.

## CNA-Record (Kanon, cvelistV5)

- CNA: **VulnCheck**
- State: PUBLISHED
- Stand: 2026-09-29 22:10:37
- CNA-CVSS: **9.2** (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

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

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- a160e39c7ae935bee613db1fe398989e31672018 (Commit)
- 9d74afe9f2d5f847aadd1aae99cc59c6efd6c326 (Commit)

## Referenzen

- <https://github.com/renovatebot/renovate/security/advisories/GHSA-9hmg-9h89-jhmx>
- <https://www.vulncheck.com/advisories/renovate-before-44.11.3-credential-exfiltration-via-link-header>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-88880/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_