CVE-2023-26136
Versions of the package tough-cookie before 4.1.3 are vulnerable to Prototype Pollution due to improper handling of Cookies when using CookieJar in...
- Published
- Jul 1, 2023
- Updated
- Aug 27, 2025
- Assigning CNA
- snyk
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 84.2%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Versions of the package tough-cookie before 4.1.3 are vulnerable to Prototype Pollution due to improper handling of Cookies when using CookieJar in rejectPublicSuffixes=false mode. This issue arises from the manner in which the objects are initialized.
Sources
6- SealSecurityAssignmentResearch
Researching on the vulnrability CVE-2023-26136
Patched tough-cookie v2.5.0 fixing CVE-2023-26136 prototype pollution vulnerability with Object.create(null) in MemoryCookieStore, including exploit demonstration and unit tests.
- SealSecurity_ExamPatch
Fix prototype pollution vulnerability (CVE-2023-26136) for tough-cookie package
Responsible use
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