CVE-2026-88880

critical · 9.2

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.

9.2

CVSS

0.5%

EPSS (exploit prob.)

43rd

EPSS percentile

2026-09-10

Published

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/E:X/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

Weaknesses

CWE-601

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-88880