DEBIAN-CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

UBUNTU-CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079 Mistune ReDoS in LINK_TITLE_RE allows denial of service with crafted Markdown titles

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079

Mistune 3.0.0a1–3.2.0 contains a ReDoS in LINK_TITLE_RE used for parsing link titles, enabling exponential backtracking when processing Markdown strings with repeated ! sequences and no closing quote. The ambiguity arises from overlapping alternatives in the two branches (double-quoted and single...

CVE-2026-33079 Mistune ReDoS in LINK_TITLE_RE allows denial of service with crafted Markdown titles

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079 Mistune ReDoS in LINK_TITLE_RE allows denial of service with crafted Markdown titles

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

CVE-2026-33079

In versions 3.0.0a1 through 3.2.0 of Mistune, there is a ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE that allows an attacker who can supply Markdown for parsing to cause denial of service. The regular expression used for parsing link titles contains overlapping...

Duplicate Advisory: Mistune has a ReDoS in LINK_TITLE_RE that allows denial of service via crafted Markdown input

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-8mp2-v27r-99xp. This link is maintained to preserve external references. Original Description Summary Denial-of-Service DoS vulnerability in the Mistune Markdown parser. The issue occurs when processing speciall...

GHSA-HJPH-F4MC-WX4C Duplicate Advisory: Mistune has a ReDoS in LINK_TITLE_RE that allows denial of service via crafted Markdown input

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-8mp2-v27r-99xp. This link is maintained to preserve external references. Original Description Summary Denial-of-Service DoS vulnerability in the Mistune Markdown parser. The issue occurs when processing speciall...

Mistune has a ReDoS in LINK_TITLE_RE that allows denial of service via crafted Markdown input

Summary A ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE allows an attacker who can supply Markdown for parsing to cause denial of service. A crafted 58-byte Markdown document blocks the parser for approximately 6 seconds measured on Apple M2, Python 3.14.3, with...

GHSA-8MP2-V27R-99XP Mistune has a ReDoS in LINK_TITLE_RE that allows denial of service via crafted Markdown input

Summary A ReDoS Regular Expression Denial of Service vulnerability in LINKTITLERE allows an attacker who can supply Markdown for parsing to cause denial of service. A crafted 58-byte Markdown document blocks the parser for approximately 6 seconds measured on Apple M2, Python 3.14.3, with...

EUVD-2026-27877

Mistune has a ReDoS in LINKTITLERE that allows denial of service via crafted Markdown input...

CVE-2026-44897

creationtimestamp| type| source ---|---|--- 2026-05-06 07:13:48+00:00| published-proof-of-concept| https://github.com/lepture/mistune/security/advisories/GHSA-v87v-83h2-53w7 2026-08-21 22:43:14+00:00| seen| https://gist.github.com/EbonJaeger/dbd95fac767f33b74282ee64940b0537 2026-08-22...

PT-2026-38088

Name of the Vulnerable Software and Affected Versions Mistune versions 3.0.0a1 through 3.2.0 Description A Regular Expression Denial of Service ReDoS exists in the LINK TITLE RE regular expression. An attacker can provide specially crafted Markdown for parsing that triggers catastrophic...

mistune 安全漏洞

Mistune is a fast and powerful Python Markdown parser developed by Hsiaoming Yang. Versions of Mistune from 3.0.0a1 to 3.2.0 contain security vulnerabilities. These vulnerabilities stem from a denial-of-service attack involving regular expressions in LINKTITLERE, which could allow attackers to...

PT-2026-38261

Name of the Vulnerable Software and Affected Versions mistune versions prior to 3.2.1 Description A Denial-of-Service DoS issue exists in the Mistune Markdown parser. Processing specially crafted reference links can cause excessive backtracking and parsing loops within the parse link title functi...

mistune: catastrophic backtracking

A regular expression denial of service ReDoS flaw was found in the asteris emphasis regular expression implementation in Mistune. By sending specially-crafted regex input, a remote attacker could invoke a catastrophic backtrack, resulting in a denial of service...

mistune: catastrophic backtracking

A regular expression denial of service ReDoS flaw was found in the asteris emphasis regular expression implementation in Mistune. By sending specially-crafted regex input, a remote attacker could invoke a catastrophic backtrack, resulting in a denial of service...