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.

CVSS 4.0

9.2CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

CVSS 3.1

8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N

EPSS

0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-25)

CWE

CWE-601

Published

2026-09-10

Modified

2026-09-29

Record from

the NVD, synced 2026-10-19

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

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