CVE-2026-59887

linkify-it is a links recognition library with full Unicode support. Prior to 5.0.2, the mailto: schema validator used by .test and .match can be invoked at every mailto: occurrence and scan the remaining input through srcemailname in lib/re.mjs, causing On^2 CPU consumption on crafted user text...

CVE-2026-59887 linkify-it: Quadratic-complexity DoS via the `mailto:` validator scan-loop on attacker text

linkify-it is a links recognition library with full Unicode support. Prior to 5.0.2, the mailto: schema validator used by .test and .match can be invoked at every mailto: occurrence and scan the remaining input through srcemailname in lib/re.mjs, causing On^2 CPU consumption on crafted user text...

CVE-2026-59887: Inefficient Algorithmic Complexity

linkify-it is a links recognition library with full Unicode support. Prior to 5.0.2, the mailto: schema validator used by .test and .match can be invoked at every mailto: occurrence and scan the remaining input through srcemailname in lib/re.mjs, causing On^2 CPU consumption on crafted user text...

CVE-2026-48801

creationtimestamp| type| source ---|---|--- 2026-06-26 22:35:32+00:00| published-proof-of-concept| https://github.com/markdown-it/linkify-it/security/advisories/GHSA-22p9-wv53-3rq4 2026-07-14 23:48:48+00:00| seen| https://bsky.app/profile/cve.skyfleet.blue/post/3mqnfglsj4s2w 2026-07-27...

GHSA-22P9-WV53-3RQ4 LinkifyIt#match scan loop has quadratic algorithmic complexity

Summary LinkifyIt.prototype.match — the package's primary public API — has ON² algorithmic complexity for inputs containing many fuzzy links or emails. This is not a regex backtrack bug; it's a structural issue in the JS-level scan loop that re-slices the input and re-runs unanchored regex search...

LinkifyIt#match scan loop has quadratic algorithmic complexity

Summary LinkifyIt.prototype.match — the package's primary public API — has ON² algorithmic complexity for inputs containing many fuzzy links or emails. This is not a regex backtrack bug; it's a structural issue in the JS-level scan loop that re-slices the input and re-runs unanchored regex search...

@activeboxes/piece-gmail (0.8.1), @activeboxes/piece-imap (0.2.10) +71 more potentially affected by CVE-2026-48801 via linkify-it (5.0.0)

linkify-it NPM version 5.0.0 is affected by a known vulnerability. The following packages have a transitive dependency on linkify-it and may be impacted: - @activeboxes/piece-gmail 0.8.1 - @activeboxes/piece-imap 0.2.10 - @activepieces/piece-gmail =0.6.0, =0.2.6, =0.0.1, =1.0.0, =4.1.90, =4.1.100...

Regular Expression Denial of Service (ReDoS)

Overview org.webjars.npm:linkify-it is a Links recognition library with FULL unicode support Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS due to quadratic algorithmic complexity in the match function. An attacker can exhaust CPU resources and caus...

Regular Expression Denial of Service (ReDoS)

Overview linkify-it is a Links recognition library with FULL unicode support Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS due to quadratic algorithmic complexity in the match function. An attacker can exhaust CPU resources and cause significant...

@activeboxes/piece-gmail (0.8.1), @activeboxes/piece-imap (0.2.10) +71 more potentially affected by CVE-2026-48801 via linkify-it (5.0.0)

linkify-it NPM version 5.0.0 is affected by a known vulnerability. The following packages have a transitive dependency on linkify-it and may be impacted: - @activeboxes/piece-gmail 0.8.1 - @activeboxes/piece-imap 0.2.10 - @activepieces/piece-gmail =0.6.0, =0.2.6, =0.0.1, =1.0.0, =4.1.90, =4.1.100...

PT-2026-53018

Name of the Vulnerable Software and Affected Versions linkify-it versions prior to 5.0.1 Description LinkifyIt.prototype.match the primary public API contains a structural issue in its JavaScript-level scan loop that results in ON² algorithmic complexity when processing inputs with numerous fuzzy...

GHSA-G75F-G53V-794X Bleach linkify(parse_email=True) CPU exhaustion via unbounded email regex scanning

Summary Bleach 6.3.0 exposes a documented email-linkification path through bleach.linkify..., parseemail=True. The implementation scans attacker-controlled text with EMAILRE.finditer over the full character token and has no length, timeout, or linear prefilter before applying the dot-atom email...

CVE-2026-40565

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters " in the URL. HTMLPurifier called first via...

CVE-2026-40565

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters " in the URL. HTMLPurifier called first via...

CVE-2026-40565 FreeScout has Stored XSS / CSS Injection via linkify() — Unescaped URL in Anchor href

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters " in the URL. HTMLPurifier called first via...

CVE-2026-40565 FreeScout has Stored XSS / CSS Injection via linkify() — Unescaped URL in Anchor href

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters " in the URL. HTMLPurifier called first via...

CVE-2026-40565 FreeScout has Stored XSS / CSS Injection via linkify() — Unescaped URL in Anchor href

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters " in the URL. HTMLPurifier called first via...

EUVD-2026-24141

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.213, FreeScout's linkify function in app/Misc/Helper.php converts plain-text URLs in email bodies into HTML anchor tags without escaping double-quote characters " in the URL. HTMLPurifier called first via...

CVE-2026-40565

FreeScout vulnerability CVE-2026-40565 affects versions prior to 1.8.213. The issue occurs in linkify() (app/Misc/Helper.php): plain-text URLs in email bodies are converted to HTML anchor tags without escaping double-quote (") characters, and because HTMLPurifier runs first via getCleanBody(), th...

FreeScout 安全漏洞

FreeScout is a lightweight and powerful free open-source help desk and shared inbox built using PHP Laravel framework by FreeScout Inc. Versions of FreeScout prior to 1.8.213 contained security vulnerabilities. These vulnerabilities stemmed from the linkify function in app/Misc/Helper.php, which...