CVE-2026-55520 Protego: Exponential backtracking ReDoS in robots.txt URL wildcard matching

Protego is a pure-Python robots.txt parser with support for modern conventions. Prior to 0.6.2, protego.urlpattern.URLPattern.preparepatternforregex translates every asterisk in an Allow or Disallow directive into a lazy regular-expression wildcard, so a directive containing many asterisks create...

Phalcon: Catastrophic backtracking (ReDoS) in the default Phalcon Router route lead to remote unauthenticated DoS

Summary Every Phalcon MVC application built with a default router new Phalcon\Mvc\Router or new Phalcon\Mvc\Routertrue, which is the normal case registers a built-in route whose compiled PCRE pattern is ^/\w0-9\-+/\w0-9.+/.$u. The trailing /. is a nested quantifier whose group body /. overlaps...

GHSA-X7RJ-F32V-7JJG Phalcon: Catastrophic backtracking (ReDoS) in the default Phalcon Router route lead to remote unauthenticated DoS

Summary Every Phalcon MVC application built with a default router new Phalcon\Mvc\Router or new Phalcon\Mvc\Routertrue, which is the normal case registers a built-in route whose compiled PCRE pattern is ^/\w0-9\-+/\w0-9.+/.$u. The trailing /. is a nested quantifier whose group body /. overlaps...

CVE-2026-55520: Uncontrolled Resource Consumption

Protego is a pure-Python robots.txt parser with support for modern conventions. Prior to 0.6.2, protego.urlpattern.URLPattern.preparepatternforregex translates every asterisk in an Allow or Disallow directive into a lazy regular-expression wildcard, so a directive containing many asterisks create...

CVE-2026-33607

An attacker that has valid credentials can use IMAP LIST command to consume CPU. This can cause degradation or denial of service for IMAP. Monitor system for abnormal CPU usage and kill the offending process and lock account. Alternatively install fixed version. No publicly available exploits are...

UBUNTU-CVE-2026-33607

An attacker that has valid credentials can use IMAP LIST command to consume CPU. This can cause degradation or denial of service for IMAP. Monitor system for abnormal CPU usage and kill the offending process and lock account. Alternatively install fixed version. No publicly available exploits are...

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-2026-79770

A flaw was found in Nokogiri. A remote attacker can inject specially crafted CSS selectors into methods such as Nodecss or Nodeatcss. This injection can lead to regular expression denial of service ReDoS due to exponential regex backtracking, causing the application to become unresponsive...

TencentOS Server 3: perl-Date-Manip (TSSA-2026:0907)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0907 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:...

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...

CVE-2026-62326 Weblate Has Uncontrolled Resource Consumption via

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...

EUVD-2026-66718

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...

Duplicate Advisory: ReDoS in nltk.text.Text.findall() via unvalidated user-supplied regular expressions

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-rrv8-h7p8-rx55. This link is maintained to preserve external references. Original Description NLTK versions before 3.10.0 contain a regular expression denial of service vulnerability in Text.findall and...

SUSE CVE-2026-79770

Nokogiri versions before 1.19.3 contain regular expression denial of service vulnerabilities in the CSS selector tokenizer affecting string-literal and identifier tokenization. Attackers can inject adversarial CSS selectors into methods like Nodecss, Nodeatcss, and Searchablesearch to cause...

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,...

PYSEC-2026-3750

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,...