Cookie-attribute injection via per-instance prototype hijack
Published Jun 10, 2026 · Updated Aug 28, 2026
Prototype pollution in js-cookie before 3.0.7 allows remote attackers to inject cookie attributes through JSON-derived objects. The assign() helper copies an enumerable proto key with plain assignment, then set() serializes inherited keys as attributes. Exploitation requires an application to pass attacker-influenced JSON into an attributes argument, enabling cookie scope, security, lifetime, or deletion changes.
Summary
What happened
Prototype pollution in js-cookie before 3.0.7 allows remote attackers to inject cookie attributes through JSON-derived objects. The assign() helper copies an enumerable proto key with plain assignment, then set() serializes inherited keys as attributes. Exploitation requires an application to pass attacker-influenced JSON into an attributes argument, enabling cookie scope, security, lifetime, or deletion changes.
The record
- CVE
- CVE-2026-46625
- Published
- Jun 10, 2026
- Updated
- Aug 28, 2026
- Vendor
- 389 Directory Server
- Product
- Red Hat OpenShift Service Mesh
- Classifications
- CWE-1321, CWE-915
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 10, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 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?
Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.
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
Public exploit references
- GHSA cookie-attribute injection demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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