CVE-2026-88880 Renovate before 44.11.3 Credential Exfiltration via Link Header
Attackers can exfiltrate authentication credentials by manipulating Link headers in GitLab pagination responses, affecting Renovate users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-88880?
CVE-2026-88880 is a critical vulnerability in mend-renovate-ce, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-601
Which versions are affected by CVE-2026-88880?
How do I fix CVE-2026-88880?
No fix has been published for CVE-2026-88880 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-88880 being exploited?
There is no known exploitation of CVE-2026-88880 in the wild and no public exploit code.
Sources
Also known as GHSA-9hmg-9h89-jhmx, GHSA-wqcg-39wp-gpqc.