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CVE-2026-77082
5.3 MEDIUM
- CVSS version (CVSS): 4.0
- Attack Vector (AV): Network (N)
- Attack Complexity (AC): Low (L)
- Attack Requirement (AT): None (N)
- Privileges Required (PR): Low (L)
- User Interaction (UI): None (N)
- Vulnerable System Impact Confidentiality (VC): None (N)
- Vulnerable System Impact Integrity (VI): None (N)
- Vulnerable System Impact Availability (VA): Low (L)
- Subsequent System Impact Confidentiality (SC): None (N)
- Subsequent System Impact Integrity (SI): None (N)
- Subsequent System Impact Availability (SA): None (N)
- Modified Attack Vector (MAV): Network (N)
- Modified Attack Complexity (MAC): Low (L)
- Modified Attack Requirement (MAT): None (N)
- Modified Privileges Required (MPR): Low (L)
- Modified User Interaction (MUI): None (N)
- Modified Vulnerable System Impact Confidentiality (MVC): None (N)
- Modified Vulnerable System Impact Integrity (MVI): None (N)
- Modified Vulnerable System Impact Availability (MVA): Low (L)
- Modified Subsequent System Impact Confidentiality (MSC): Negligible (N)
- Modified Subsequent System Impact Integrity (MSI): Negligible (N)
- Modified Subsequent System Impact Availability (MSA): Negligible (N)
- Safety (S): Not Defined (X)
- Automatable (AU): Not Defined (X)
- Recovery (R): Not Defined (X)
- Value Density (V): Not Defined (X)
- Vulnerability Response Effort (RE): Not Defined (X)
- Provider Urgency (U): Not Defined (X)
- Confidentiality Req. (CR): Not Defined (X)
- Integrity Req. (IR): Not Defined (X)
- Availability Req. (AR): Not Defined (X)
- Exploit Maturity (E): Not Defined (X)
Activity log
- Created suggestion
n8n before 1.123.69 ReDoS via Filter and Switch Node
n8n before 1.123.69, 2.x before 2.33.4, and 2.34.x before 2.34.1 contains a regular expression denial of service (ReDoS) vulnerability in the Filter and Switch nodes, which compile user-supplied regex patterns with new RegExp() and execute them synchronously on the worker thread without complexity validation or execution timeout. A crafted regex pattern can block the worker for an extended period per data item processed, delaying other workflow executions on the same worker.
References
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GitHub Security Advisory (GHSA-q3fv-295f-qfpf) vendor-advisory
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VulnCheck Advisory: n8n before 1.123.69 ReDoS via Filter and Switch Node third-party-advisory
Affected products
n8n
- ==1.123.69
- <2.34.1
- <1.123.69
- ==2.34.1
- ==2.33.4
- <2.33.4
Matching in nixpkgs
pkgs.n8n
Free and source-available fair-code licensed workflow automation tool
pkgs.n8n-nodes-carbonejs
n8n community node for rendering Word templates using Carbone.js
pkgs.n8n-nodes-evolution-api
Evolution API hub for WhatsApp integration with n8n
Package maintainers
-
@sweenu sweenu <contact@sweenu.xyz>
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@gepbird Gutyina Gergő <gutyina.gergo.2@gmail.com>
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@AdrienLemaire Adrien Lemaire <lemaire.adrien@gmail.com>
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@vitorpavani Vitor Pavan <vipavani@hotmail.com>