getsentry sentry-javascript up to 10.26.x Cookie Header insertion of sensitive information into sent data

Summaryinfo

A vulnerability described as problematic has been identified in getsentry sentry-javascript up to 10.26.x. This issue affects some unknown processing of the component Cookie Header Handler. Executing a manipulation can lead to insertion of sensitive information into sent data. This vulnerability is handled as CVE-2025-65944. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in getsentry sentry-javascript up to 10.26.x and classified as problematic. This vulnerability affects an unknown code block of the component Cookie Header Handler. The manipulation with an unknown input leads to a insertion of sensitive information into sent data vulnerability. The CWE definition for the vulnerability is CWE-201. The code transmits data to another actor, but a portion of the data includes sensitive information that should not be accessible to that actor. As an impact it is known to affect confidentiality. CVE summarizes:

Sentry-Javascript is an official Sentry SDKs for JavaScript. From version 10.11.0 to before 10.27.0, when a Node.js application using the Sentry SDK has sendDefaultPii: true it is possible to inadvertently send certain sensitive HTTP headers, including the Cookie header, to Sentry. Those headers would be stored within a Sentry organization as part of the associated trace. A person with access to the Sentry organization could then view and use these sensitive values to impersonate or escalate their privileges within the application. This issue has been patched in version 10.27.0.

The advisory is shared for download at github.com. This vulnerability was named CVE-2025-65944 since 11/18/2025. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation needs additional levels of successful authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 10.27.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch a820fa2891fdcf985b834a5b557edf351ec54539 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 CNNVD (CNNVD-202511-2814). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Programming Language Software

Vendor

• getsentry

Name

• sentry-javascript

Version

• 10.0
• 10.1
• 10.2
• 10.3
• 10.4
• 10.5
• 10.6
• 10.7
• 10.8
• 10.9
• 10.10
• 10.11
• 10.12
• 10.13
• 10.14
• 10.15
• 10.16
• 10.17
• 10.18
• 10.19
• 10.20
• 10.21
• 10.22
• 10.23
• 10.24
• 10.25
• 10.26

License

• open-source

Website

• Product: https://github.com/getsentry/sentry-javascript/

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Once again VulDB remains the best source for vulnerability data.

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