CVE-2026-55520

A flaw was found in Protego, a pure-Python robots.txt parser. A remote attacker could exploit this vulnerability by providing a crafted robots.txt file containing numerous asterisks in Allow or Disallow directives. This causes exponential backtracking during URL wildcard matching, leading to a...

MGASA-2026-0361 Updated perl-Date-Manip packages fix security vulnerabilities

Date::Manip versions through 6.99 for Perl return corrupted dates via non-ASCII decimal digits that pass the numeric range tests in check Date::Manip versions through 6.99 for Perl allow CPU exhaustion via quadratic backtracking in the unanchored time substitution in parsetime...

MGASA-2026-0362 Updated perl-HTTP-Date packages fix a security vulnerability

HTTP::Date versions before 6.08 for Perl allow CPU exhaustion via polynomial regex backtracking in parsedate...

Updated perl-Date-Manip packages fix security vulnerabilities

Date::Manip versions through 6.99 for Perl return corrupted dates via non-ASCII decimal digits that pass the numeric range tests in check Date::Manip versions through 6.99 for Perl allow CPU exhaustion via quadratic backtracking in the unanchored time substitution in parsetime...

Updated perl-HTTP-Date packages fix a security vulnerability

HTTP::Date versions before 6.08 for Perl allow CPU exhaustion via polynomial regex backtracking in parsedate...

CVE-2026-82735 Match regex runs on over-length input in Ash.Type.String, enabling regex denial of service

Uncontrolled Resource Consumption vulnerability in ash-project ash allows an attacker to force an expensive regular expression to run on input that a length constraint should have already rejected. Ash.Type.String.applyconstraints/2 lib/ash/type/string.ex evaluated the :match regex regardless of...

EEF-CVE-2026-82735 Match regex runs on over-length input in Ash.Type.String, enabling regex denial of service

Summary Uncontrolled Resource Consumption vulnerability in ash-project ash allows an attacker to force an expensive regular expression to run on input that a length constraint should have already rejected. Ash.Type.String.applyconstraints/2 lib/ash/type/string.ex evaluated the :match regex...

CVE-2026-82735 Match regex runs on over-length input in Ash.Type.String, enabling regex denial of service

Uncontrolled Resource Consumption vulnerability in ash-project ash allows an attacker to force an expensive regular expression to run on input that a length constraint should have already rejected. Ash.Type.String.applyconstraints/2 lib/ash/type/string.ex evaluated the :match regex regardless of...

CVE-2026-83606: Uncontrolled Resource Consumption

xmldom is a pure JavaScript W3C standard-based XML DOM Level 2 Core DOMParser and XMLSerializer module. From 0.9.0-beta.9 until 0.9.11, the processing-instruction production in lib/grammar.js lets the greedy S+ separator and lazy Char? data group repeatedly repartition a long whitespace tail when...

Alibaba Cloud Linux 3 : 0279: perl-Date-Manip (ALINUX3-SA-2026:0279)

The remote Alibaba Cloud Linux 3 host has a package installed that is affected by a vulnerability as referenced in the ALINUX3-SA-2026:0279 advisory. Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities: CVE-2026-60075: Date::Manip versions through 6.99 f...

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

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-w3v8-gmh9-3wv7. This link is maintained to preserve external references. Original Description NLTK before 3.10.3 contains a regular expression denial of service ReDoS vulnerability in the tgrep module. The...

CVE-2026-72818

A flaw was found in NLTK. The TweetTokenizer component, used for processing social media text, contains a regular expression vulnerability. A remote unauthenticated attacker can provide specially crafted input containing many alternating label separators, causing the regular expression to backtra...

Denial-of-Service (DoS)

Protego is vulnerable to a Denial-of-Service DoS. The vulnerability is due to excessive backtracking caused by translating multiple asterisks in Allow or Disallow directives into lazy regular-expression wildcards, which allows an attacker to provide a crafted robots.txt file and cause...

CVE-2026-55520

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...

GHSA-WJMF-P669-5M5P Protego has exponential backtracking ReDoS in robots.txt URL wildcard matching

Problem description Protego constructs regular expressions to match URLs against robots.txt Allow: and Disallow: directives, see protego.urlpattern.URLPattern.preparepatternforregex. Every in the directive value is translated into a lazy .? regex piece, thus a specially crafted directive value wi...

Protego has exponential backtracking ReDoS in robots.txt URL wildcard matching

Problem description Protego constructs regular expressions to match URLs against robots.txt Allow: and Disallow: directives, see protego.urlpattern.URLPattern.preparepatternforregex. Every in the directive value is translated into a lazy .? regex piece, thus a specially crafted directive value wi...

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...

CVE-2026-55520

Protego is a pure-Python robots.txt parser. Prior to 0.6.2 , the _URLPattern._prepare_pattern_for_regex method in src/protego/_urlpattern.py translates every asterisk in an Allow or Disallow directive into a lazy regex wildcard. A directive containing many asterisks triggers exponential backtrack...

EUVD-2026-67865

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-2026-55520 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...