CVE-2026-88880

Renovate before 44.11.3 Credential Exfiltration via Link Header

State: Published
Severity: 9.2 Critical
Published: Sep 10, 2026
Updated: Sep 29, 2026
Reserved: Sep 10, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	9.2 Critical	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	VulnCheck
3.1	8.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N	VulnCheck

Weaknesses

CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

Affected Products

Product	Versions
renovaterenovatebot	before 44.11.3Affected 44.11.3Not affected
renovate-cemend	before 15.4.0Affected 15.4.0Not affected
renovate-ee-servermend	before 15.4.0Affected 15.4.0Not affected
renovate-ee-workermend	before 15.4.0Affected 15.4.0Not affected
mend-renovate-cemend	before 15.4.0Affected 15.4.0Not affected
mend-renovate-enterprise-editionmend	before 10.4.0Affected 10.4.0Not affected

References

GitHub Security Advisory (GHSA-9hmg-9h89-jhmx)vendor-advisory
VulnCheck Advisory: Renovate before 44.11.3 Credential Exfiltration via Link Headerthird-party-advisory

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