Cross-origin cookie disclosure via case-sensitive PSL check
Published Dec 7, 2023 · Updated Jul 14, 2026
Cookie-domain validation in curl 7.46.0 through 8.4.0 allows remote attackers to send cookies across unrelated domains. The PSL check compares a lowercased request hostname with an unnormalized cookie domain, so mixed-case public suffixes evade rejection. Cookie handling must be enabled; an attacker-controlled HTTP server can plant a broad cookie that curl later transmits to unrelated origins.
Summary
What happened
Cookie-domain validation in curl 7.46.0 through 8.4.0 allows remote attackers to send cookies across unrelated domains. The PSL check compares a lowercased request hostname with an unnormalized cookie domain, so mixed-case public suffixes evade rejection. Cookie handling must be enabled; an attacker-controlled HTTP server can plant a broad cookie that curl later transmits to unrelated origins.
The record
- CVE
- CVE-2023-46218
- Published
- Dec 7, 2023
- Updated
- Jul 14, 2026
- Vendor
- Siemens
- Product
- RUGGEDCOM ROX RX1500
- Classifications
- CWE-201
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 7, 2023CVE publishedPublication date reported by the CVE source.
- Jul 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <V2.17.0
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What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
Public exploit references
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Technologies
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Your stack
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