by Kastro
Paper/Archive/CVE-2026-88880

CVE-2026-88880

renovatebot renovate — Renovate before 44.11.3 Credential Exfiltration via Link Header

EPSS 0.5%CVSS 9.2
critical.is priorityof 100
36
CVSS 9.2 (CNA)9.2 / 10 × 3027.6Not in CISA KEV+300.0EPSS percentile 43.1.431 × 208.6No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
renovate< 44.11.344.11.3CNA
renovate-ce< 15.4.015.4.0CNA
renovate-ee-server< 15.4.015.4.0CNA
renovate-ee-worker< 15.4.015.4.0CNA
mend-renovate-ce< 15.4.015.4.0CNA
mend-renovate-enterprise-edition< 10.4.010.4.0CNA

Scores by source

VulnCheck (CNA)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
VulnCheck (CNA)8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

advisorygithub.com/renovatebot/renovate/security/advisories/GHSA-9hmg-9h89-jhmxwriteupvulncheck.com/advisories/renovate-before-44.11.3-credential-exfiltration-via-link-header