tough-cookie up to 4.1.2 Cookies prototype pollution

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability was found in tough-cookie up to 4.1.2 and classified as critical. This issue affects some unknown processing of the component Cookies Handler. Executing a manipulation can lead to prototype pollution. This vulnerability is tracked as CVE-2023-26136. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in tough-cookie up to 4.1.2 and classified as critical. This vulnerability affects an unknown code of the component Cookies Handler. The manipulation with an unknown input leads to a prototype pollution vulnerability. The CWE definition for the vulnerability is CWE-1321. The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was disclosed 07/01/2023 as 282. The advisory is shared for download at github.com. This vulnerability was named CVE-2023-26136 since 02/20/2023. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.

Upgrading to version 4.1.3 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 12d474791bb856004e858fdb1c47b7608d09cf6e is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-1983). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector (Snyk): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Prototype pollution
CWE: CWE-1321 / CWE-94 / CWE-74
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: tough-cookie 4.1.3
Patch: 12d474791bb856004e858fdb1c47b7608d09cf6e

Timelineinfo

02/20/2023 🔍
07/01/2023 +130 days 🔍
07/01/2023 +0 days 🔍
08/27/2025 +788 days 🔍

Sourcesinfo

Advisory: 282
Status: Confirmed

CVE: CVE-2023-26136 (🔍)
GCVE (CVE): GCVE-0-2023-26136
GCVE (VulDB): GCVE-100-232852
EUVD: 🔍

Entryinfo

Created: 07/01/2023 11:13
Updated: 08/27/2025 05:55
Changes: 07/01/2023 11:13 (52), 07/22/2023 14:51 (11), 08/27/2025 05:55 (15)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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