What’s Vulnerable › Vulnerabilities

CVE-2023-26136: tough-cookie Prototype Pollution vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-07-01 · updated 2026-06-17
• Weakness: CWE-1321

Description

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.

Affected products

• tough-cookie: before 4.1.3 — fixed in 4.1.3
• Npm Tough-Cookie: before 4.1.3 — fixed in 4.1.3

How to fix

Upgrade to a fixed version: tough-cookie 4.1.3; Npm Tough-Cookie 4.1.3. Check the vendor advisory for mitigations.

References

• https://github.com/salesforce/tough-cookie/commit/12d474791bb856004e858fdb1c47b7608d09cf6e
• https://github.com/salesforce/tough-cookie/issues/282
• https://github.com/salesforce/tough-cookie/releases/tag/v4.1.3
• https://lists.debian.org/debian-lts-announce/2023/07/msg00010.html
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3HUE6ZR5SL73KHL7XUPAOEL6SB7HUDT2/
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6PVVPNSAGSDS63HQ74PJ7MZ3MU5IYNVZ/
• https://security.netapp.com/advisory/ntap-20240621-0006/
• https://security.snyk.io/vuln/SNYK-JS-TOUGHCOOKIE-5672873
• https://github.com/salesforce/tough-cookie/commit/12d474791bb856004e858fdb1c47b7608d09cf6e
• https://github.com/salesforce/tough-cookie/issues/282
• https://github.com/salesforce/tough-cookie/releases/tag/v4.1.3
• https://lists.debian.org/debian-lts-announce/2023/07/msg00010.html

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