High severity · published Sep 10, 2026
CVE-2026-88880
Renovate before 44.11.3 Credential Exfiltration via Link Header
8.6
CVSS
0.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
mend-renovate-ce · mend
before 15.4.0 · source: vendor
ME
mend-renovate-enterprise-edition · mend
before 10.4.0 · source: vendor
RE
renovate · renovatebot
before 44.11.3 · source: vendor
RE
renovate-ce · mend
before 15.4.0 · source: vendor
RE
renovate-ee-server · mend
before 15.4.0 · source: vendor
RE
renovate-ee-worker · mend
before 15.4.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-88880
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-88880
vendor-advisory
https://github.com/renovatebot/renovate/security/advisories/GHSA-9hmg-9h89-jhmx
third-party-advisory
https://www.vulncheck.com/advisories/renovate-before-44.11.3-credential-exfiltration-via-link-header
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