bleach

====== Bleach NOTE: 2026-06-05: Bleach is no longer maintained. There will be no future releases including for security issues. See issue: Bleach is an allowed-list-based HTML sanitizing library that escapes or strips markup and attributes. Bleach can also linkify text safely, applying filters th...

Security Bulletin: Vulnerability in bleach bundled with IBM Fusion, IBM Fusion HCI, and IBM Fusion Data Cataloging.

Summary IBM Fusion, IBM Fusion HCI, and IBM Fusion Data Cataloging include the bleach library, which is affected by a improper input validation vulnerability. CVE-2025-0938. Vulnerability Details CVEID:CVE-2025-0938 DESCRIPTION: The Python standard library functions urllib.parse.urlsplit and...

Astra Linux – Vulnerability in python-bleach

A mutation XSS affects users who call bleachclean with any of the following tags: svg or math within the allowed tags p or br in allowed tags, style, title, noscript, script, textarea, noframes, iframe, or xmp within allowed tags. The keyword argument is stripcomments=False. Note: None of the abo...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: python-bleach (UTSA-2026-093655)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-093655 advisory. A mutation XSS affects users calling bleach.clean with all of: svg or math in the allowed tags p or br in allowed tags style, title, noscript, script, textarea,...

Exploit for Cross-site Scripting in Mozilla Bleach

No d...

python313-bleach-6.4.0-1.1 on GA media (moderate)

python313-bleach-6.4.0-1.1 on GA media Announcement ID: openSUSE-SU-2026:11323-1 Rating: moderate Cross-References: CVE-2018-7753 CVE-2020-6802 CVE-2020-6816 CVE-2020-6817 CVE-2021-23980 CVSS scores: CVE-2021-23980 SUSE : 6.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Affected Products: openSUS...

PT-2026-63453

These are all security issues fixed in the python313-bleach-6.4.0-1.1 package on the GA media of openSUSE Tumbleweed...

OPENSUSE-SU-2026:11323-1 python313-bleach-6.4.0-1.1 on GA media

These are all security issues fixed in the python313-bleach-6.4.0-1.1 package on the GA media of openSUSE Tumbleweed...

CVE-2026-59923

A flaw was found in Mistune, a Python Markdown parser. This vulnerability allows an attacker to bypass URL protections by using specially crafted Markdown links or images containing percent-encoded javascript URIs. This can lead to the execution of arbitrary scripts in the rendered HTML,...

Bleach clean() / Cleaner() fails to sanitize dangerous URI schemes in allowed formaction attributes

Summary Bleach clean / Cleaner fails to sanitize dangerous URI schemes in allowed formaction attributes. Bleach applies URI protocol sanitization only to attributes listed in attrvalisuri. While URI-bearing attributes such as action, href, src, and poster are included in that set, formaction is...

GHSA-GJ48-438W-JH9V Bleach clean() / Cleaner() fails to sanitize dangerous URI schemes in allowed formaction attributes

Summary Bleach clean / Cleaner fails to sanitize dangerous URI schemes in allowed formaction attributes. Bleach applies URI protocol sanitization only to attributes listed in attrvalisuri. While URI-bearing attributes such as action, href, src, and poster are included in that set, formaction is...

Regular Expression Denial of Service (ReDoS)

Overview bleach is a whitlist-based HTML sanitizing library that escapes or strips markup and attributes. Affected versions of this package are vulnerable to Regular Expression Denial of Service ReDoS via the LinkifyFilter.handleemailaddresses function. An attacker can cause excessive CPU...

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...

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...

Incomplete List of Disallowed Inputs

Overview bleach is a whitlist-based HTML sanitizing library that escapes or strips markup and attributes. Affected versions of this package are vulnerable to Incomplete List of Disallowed Inputs via the bleach.clean function when processing URIs containing disallowed scheme patterns with inserted...

Bleach: URI sanitization allows disallowed URI schemes with Unicode > U+00A0 in output

Impact A possible XSS bypass affects users calling bleach.clean with all of: a in the allowed tags href in allowed attributes The bleach.clean sanitizer outputs URIs containing disallowed scheme patterns that it should be stripping. However, because the inserted Unicode characters make the scheme...

GHSA-8RFP-98V4-MMR6 Bleach: URI sanitization allows disallowed URI schemes with Unicode > U+00A0 in output

Impact A possible XSS bypass affects users calling bleach.clean with all of: a in the allowed tags href in allowed attributes The bleach.clean sanitizer outputs URIs containing disallowed scheme patterns that it should be stripping. However, because the inserted Unicode characters make the scheme...

PT-2026-52868

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

CVE-2014-8881

All versions of the "bleach" package are vulnerable to a regular expression denial of service attack when certain types of input are passed into the sanitize function...

Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Bleach vulnerabilities (USN-8077-1)

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8077-1 advisory. It was discovered that Bleach did not properly sanitize URI attributes containing character entities. An attacker could possibly...