Open Redirect in Renovatebot Renovate
CVE-2026-88880
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.
Vulnerability class: Open Redirect
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (42.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/renovatebot/renovate/security/advisories/GHSA-9hmg-9h89-jhmx (vendor-advisory)
- www.vulncheck.com/advisories/renovate-before-44.11.3-credential-exfiltration-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-88880?
- CVE-2026-88880 is a high-severity vulnerability in Renovatebot Renovate, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 8.6/10. Published 2026-09-10.
- How severe is CVE-2026-88880?
- High severity. CVSS v3 base score is 8.6 out of 10.