Node undici: (undici's cache interceptor does not handle the Set-Cookie response hea ...) (CVE-2026-84933)
A vulnerability in the Node.js undici HTTP client library's cache interceptor causes it to improperly handle the Set-Cookie response header. This flaw could lead to unintended consequences related to cookie management. The issue has a CVSS 3.1 base score of 6.5, indicating a medium severity level. No known exploits are reported in the wild, and no patch or remediation details are currently available.
AI Analysis
Technical Summary
The undici HTTP client's cache interceptor does not correctly process the Set-Cookie response header, potentially affecting how cookies are cached or managed. This vulnerability is identified as CVE-2026-84933 with a CVSS 3.1 score of 6.5 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N), indicating network attack vector, high attack complexity, no privileges required, no user interaction, unchanged scope, high confidentiality impact, low integrity impact, and no availability impact. There is no information about patches or fixes at this time.
Potential Impact
The vulnerability could allow an attacker to impact the confidentiality of data by exploiting improper handling of Set-Cookie headers, potentially leading to unauthorized access or leakage of sensitive cookie data. Integrity impact is low, and availability is not affected. No active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should monitor vendor communications for updates and consider mitigating risks by limiting exposure to untrusted networks or inputs that could trigger the vulnerability.
Node undici: (undici's cache interceptor does not handle the Set-Cookie response hea ...) (CVE-2026-84933)
Description
A vulnerability in the Node.js undici HTTP client library's cache interceptor causes it to improperly handle the Set-Cookie response header. This flaw could lead to unintended consequences related to cookie management. The issue has a CVSS 3.1 base score of 6.5, indicating a medium severity level. No known exploits are reported in the wild, and no patch or remediation details are currently available.
CVSS v3.1
Score 6.5medium
Affected software
pkg:deb/ubuntu/node-undici?arch=source&distro=noblepkg:deb/ubuntu/node-undici?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The undici HTTP client's cache interceptor does not correctly process the Set-Cookie response header, potentially affecting how cookies are cached or managed. This vulnerability is identified as CVE-2026-84933 with a CVSS 3.1 score of 6.5 (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N), indicating network attack vector, high attack complexity, no privileges required, no user interaction, unchanged scope, high confidentiality impact, low integrity impact, and no availability impact. There is no information about patches or fixes at this time.
Potential Impact
The vulnerability could allow an attacker to impact the confidentiality of data by exploiting improper handling of Set-Cookie headers, potentially leading to unauthorized access or leakage of sensitive cookie data. Integrity impact is low, and availability is not affected. No active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should monitor vendor communications for updates and consider mitigating risks by limiting exposure to untrusted networks or inputs that could trigger the vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-84933
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a9ee1b1acd9273b49e69d11
Added to database: 09/07/2026, 16:09:21 UTC
Last enriched: 09/07/2026, 16:15:01 UTC
Last updated: 09/08/2026, 00:25:50 UTC
Views: 7
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