Cache poisoning via unescaped forwarded prefix
Published May 4, 2023 · Updated Jan 29, 2025
Improper input validation in Gin before 1.9.0 allows remote attackers to poison caches through a crafted X-Forwarded-Prefix header. The redirectTrailingSlash function inserts the cleaned header value into a redirect path without escaping URL metacharacters, allowing fragments and schemes to alter the Location header. Exploitation requires a Gin application's routing behavior to issue the redirect and an intermediary cache or application logic to consume the attacker-controlled response.
Summary
What happened
Improper input validation in Gin before 1.9.0 allows remote attackers to poison caches through a crafted X-Forwarded-Prefix header. The redirectTrailingSlash function inserts the cleaned header value into a redirect path without escaping URL metacharacters, allowing fragments and schemes to alter the Location header. Exploitation requires a Gin application's routing behavior to issue the redirect and an intermediary cache or application logic to consume the attacker-controlled response.
The record
- CVE
- CVE-2023-26125
- Published
- May 4, 2023
- Updated
- Jan 29, 2025
- Vendor
- Gin-Gonic
- Product
- Gin
- Classifications
- CWE-20, CWE-77, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 4, 2023CVE publishedPublication date reported by the CVE source.
- Jan 29, 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 <1.9.0
What conditions does exploitation require?
What is affected?
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
Public exploit references
- Upstream crafted-header reproductionproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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