Technology · PyPI
bleach (PyPI) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 10 vulnerabilities in bleach (PyPI): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, Mozilla Bleach XSS via unsanitized formaction attribute, was published on 16 June 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 0
- Exploited in the wild
- 0
About bleach (PyPI)
A Python library that provides an allowed-list-based HTML sanitizing tool.
Latest bleach (PyPI) vulnerabilities
- Mozilla Bleach XSS via unsanitized formaction attributemediumCVSS 6.1
- Mozilla Bleach ReDoS in linkify with parse_email enabledmediumCVSS 4.3
- Mozilla Bleach URI sanitization bypass via Unicode characterslowCVSS 0
- CVE-2021-23980: PYSEC-2021-865 - In Mozilla Bleach before 3.3.0, a mutation XSS affects users calling bleach.clean with math or svg; p or…lowCVSS 3.1EPSS 0.5%
- bleach cross-site scripting in HTML sanitizationinfoCVSS 6.1
- CVE-2014-8881: bleach regular expression denial of servicelowCVSS 3.1
- CVE-2020-6817: PYSEC-2020-340 - In Mozilla Bleach before 3.1.4, `bleach.clean` behavior parsing style attributes could result in a regular…lowCVSS 3.1EPSS 0.7%
- CVE-2020-6816: PYSEC-2020-28 - In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are…lowCVSS 3.1EPSS 1.3%
- CVE-2020-6802: PYSEC-2020-27 - In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw…lowCVSS 3.1EPSS 1.7%
- CVE-2018-7753: PYSEC-2018-51 - An issue was discovered in Bleach 2.1.x before 2.1.3. Attributes that have URI values weren't properly…lowCVSS 3EPSS 2.2%
Most severe bleach (PyPI) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- Mozilla Bleach XSS via unsanitized formaction attributemediumCVSS 6.1
- Mozilla Bleach ReDoS in linkify with parse_email enabledmediumCVSS 4.3
- CVE-2020-6802: PYSEC-2020-27 - In Mozilla Bleach before 3.11, a mutation XSS affects users calling bleach.clean with noscript and a raw…lowCVSS 3.1EPSS 1.7%
- CVE-2020-6816: PYSEC-2020-28 - In Mozilla Bleach before 3.12, a mutation XSS in bleach.clean when RCDATA and either svg or math tags are…lowCVSS 3.1EPSS 1.3%
- CVE-2020-6817: PYSEC-2020-340 - In Mozilla Bleach before 3.1.4, `bleach.clean` behavior parsing style attributes could result in a regular…lowCVSS 3.1EPSS 0.7%
- CVE-2021-23980: PYSEC-2021-865 - In Mozilla Bleach before 3.3.0, a mutation XSS affects users calling bleach.clean with math or svg; p or…lowCVSS 3.1EPSS 0.5%
- CVE-2014-8881: bleach regular expression denial of servicelowCVSS 3.1
- CVE-2018-7753: PYSEC-2018-51 - An issue was discovered in Bleach 2.1.x before 2.1.3. Attributes that have URI values weren't properly…lowCVSS 3EPSS 2.2%
- Mozilla Bleach URI sanitization bypass via Unicode characterslowCVSS 0
- bleach cross-site scripting in HTML sanitizationinfoCVSS 6.1
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/bleach.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "bleach (PyPI) vulnerabilities", https://junglewise.ai/threats/technologies/bleach, 26 September 2026.