n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path

Impact The Git node's clone operation matched the destination path against the default N8NBLOCKFILEPATTERNS expression, which was written so that a crafted path caused catastrophic backtracking. Evaluation runs synchronously in the main n8n process, so an authenticated user could freeze the...

regexploit

Regexploit Encuentra expresiones regulares vulnerables a Denegación de Servicio por Expresión Regular ReDoS. Más información enel blog de Doyensec Muchos analizadores de expresiones regulares por defecto tienen una complejidad de caso peor no acotada. La coincidencia de regex puede ser rápida...

CVE-2026-86081

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the Git node clone operation matched an attacker-controlled destination path against the default N8NBLOCKFILEPATTERNS regular expression. The pattern ^./.git/.$ allowed catastrophic backtracking and ran...

CVE-2026-86081

n8n , an open-source workflow automation platform, is vulnerable to Regular Expression Denial of Service (ReDoS) in its Git node clone operation. Prior to versions 1.123.76 , 2.37.7 , and 2.38.2 , the default N8N_BLOCK_FILE_PATTERNS regex (^(./).git(/.)$) permitted catastrophic backtracking when ...

CVE-2026-86081 n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the Git node clone operation matched an attacker-controlled destination path against the default N8NBLOCKFILEPATTERNS regular expression. The pattern ^./.git/.$ allowed catastrophic backtracking and ran...

CVE-2026-86081 n8n: Regular Expression Denial of Service in the Default Blocked-File-Pattern Match via a Git Node Clone Path

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the Git node clone operation matched an attacker-controlled destination path against the default N8NBLOCKFILEPATTERNS regular expression. The pattern ^./.git/.$ allowed catastrophic backtracking and ran...

EUVD-2026-66397

NLTK: ReDoS in nltk.tgrep via unvalidated user-supplied regular expressions...

EUVD-2026-66396

NLTK: ReDoS in nltk.text.Text.findall via unvalidated user-supplied regular expressions...

PT-2026-88512

Impact The Git node's clone operation matched the destination path against the default N8N BLOCK FILE PATTERNS expression, which was written so that a crafted path caused catastrophic backtracking. Evaluation runs synchronously in the main n8n process, so an authenticated user could freeze the...

CVE-2020-5236

Waitress 1.4.2 ReDoS - CVE-2020-5236 Waitress version 1.4.2 allows a DOS attack When waitress receives a header that contains invalid characters. When a header like "Bad-header: xxxxxxxxxxxxxxx\x10" is received, it will cause the regular expression engine to catastrophically backtrack causing the...

EUVD-2026-62542

Grav: Authenticated ReDoS via regexreplace in Twig Sandbox...

CVE-2026-80205

A flaw was found in NLTK. A remote attacker can exploit a regular expression denial of service ReDoS vulnerability in the Text.findall and TokenSearcher.findall methods. These methods accept user-supplied regular expressions without validation, allowing an attacker to provide crafted patterns tha...

CVE-2026-62326

Weblate is a web-based continuous localization platform used to manage software translations. In versions prior to 2026.7, a user with the built-in "Edit source" role can store a malicious regular expression in a source string's flags that is executed without any timeout, allowing them to stall...

Regular Expression Denial of Service (ReDoS)

Overview nltk is a Natural Language Toolkit NLTK is a Python package for natural language processing. Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS in TokenSearcher.findall and Text.findall in nltk/text.py. An attacker can pin a Python worker and...

PYSEC-2026-3751

NLTK before 3.10.3 contains a regular expression denial of service ReDoS vulnerability in the tgrep module. The tgrepnodeaction function compiles user-supplied regular expressions embedded in /regex/ pattern nodes and executes them via re.search against tree node labels without any validation or...

PYSEC-2026-3751

NLTK before 3.10.3 contains a regular expression denial of service ReDoS vulnerability in the tgrep module. The tgrepnodeaction function compiles user-supplied regular expressions embedded in /regex/ pattern nodes and executes them via re.search against tree node labels without any validation or...

CVE-2026-80206

NLTK before 3.10.3 contains a regular expression denial of service ReDoS vulnerability in the tgrep module. The tgrepnodeaction function compiles user-supplied regular expressions embedded in /regex/ pattern nodes and executes them via re.search against tree node labels without any validation or...

CVE-2026-80205

NLTK versions before 3.10.0 contain a regular expression denial of service vulnerability in Text.findall and TokenSearcher.findall methods that accept user-supplied regular expressions without validation or timeout. Attackers can supply crafted regex patterns that cause catastrophic backtracking,...

CVE-2026-80206 NLTK 3.10.2 Regular Expression Denial of Service via tgrep

NLTK before 3.10.3 contains a regular expression denial of service ReDoS vulnerability in the tgrep module. The tgrepnodeaction function compiles user-supplied regular expressions embedded in /regex/ pattern nodes and executes them via re.search against tree node labels without any validation or...

CVE-2026-80206

NLTK (a Python natural language processing library) versions before 3.10.3 contain a ReDoS vulnerability in the tgrep module. The _tgrep_node_action function compiles user-supplied regular expressions embedded in /regex/ pattern nodes and executes them via re.search against tree node labels witho...