Credential disclosure via retained cross-domain authentication headers
Published Apr 21, 2026 · Updated Aug 26, 2026
Information disclosure in follow-redirects 1.15.11 and earlier allows remote attackers to obtain custom authentication headers via cross-domain redirects. The redirect logic in index.js removes only authorization, proxy-authorization, and cookie, forwarding other credential-bearing headers unchanged. Exploitation requires an application to attach a custom secret and follow a redirect to an attacker-controlled domain; the exposed credential can then be reused within its existing privileges.
Summary
What happened
Information disclosure in follow-redirects 1.15.11 and earlier allows remote attackers to obtain custom authentication headers via cross-domain redirects. The redirect logic in index.js removes only authorization, proxy-authorization, and cookie, forwarding other credential-bearing headers unchanged. Exploitation requires an application to attach a custom secret and follow a redirect to an attacker-controlled domain; the exposed credential can then be reused within its existing privileges.
The record
- CVE
- CVE-2026-40895
- Published
- Apr 21, 2026
- Updated
- Aug 26, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat Quay
- Classifications
- CWE-212, CWE-200
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 21, 2026CVE publishedPublication date reported by the CVE source.
- Aug 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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