Sensitive-header disclosure via redirect-chain restoration
Published Jan 28, 2025 · Updated Sep 18, 2025
Information disclosure in Go standard library net/http allows remote attackers to obtain sensitive HTTP headers through crafted redirects. Client.makeHeadersCopier restores headers stripped on a cross-domain hop when a later redirect remains on the new domain, forwarding Authorization and other sensitive headers. The attacker must induce a client request carrying a sensitive header and control a chain whose first hop changes domains and whose next hop stays on the new domain.
Summary
What happened
Information disclosure in Go standard library net/http allows remote attackers to obtain sensitive HTTP headers through crafted redirects. Client.makeHeadersCopier restores headers stripped on a cross-domain hop when a later redirect remains on the new domain, forwarding Authorization and other sensitive headers. The attacker must induce a client request carrying a sensitive header and control a chain whose first hop changes domains and whose next hop stays on the new domain.
The record
- CVE
- CVE-2024-45336
- Published
- Jan 28, 2025
- Updated
- Sep 18, 2025
- Vendor
- Go standard library
- Product
- net/http
- Classifications
- Unavailable
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 28, 2025CVE publishedPublication date reported by the CVE source.
- Sep 18, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.22.11
- Affected versionversion=1.23.0-0 <1.23.5
- Affected versionversion=1.24.0-0 <1.24.0-rc.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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