# Symfony HtmlSanitizer vulnerabilities

Source: https://junglewise.ai/threats/technologies/htmlsanitizer  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/htmlsanitizer.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 9 vulnerabilities in Symfony HtmlSanitizer: 0 in the last 7 days and 3 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-121949, was published on 5 November 2026. 3 vulnerabilities in the last four weeks, up from none in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 3
- Last 90 days: 3
- All time: 9 (0 critical, 0 exploited in the wild)

## About Symfony HtmlSanitizer

HtmlSanitizer is a Symfony component that provides an object-oriented API to clean untrusted HTML input.

## Latest Symfony HtmlSanitizer vulnerabilities

- [CVE-2026-121949: Symfony HtmlSanitizer media URL policy bypass in srcset attributes](https://junglewise.ai/threats/cve-2026-121949-the-symfony-htmlsanitizer-component-does-not-apply-the-media-url) (info, published 5 Nov 2026)
- [CVE-2026-118517: Symfony HtmlSanitizer UrlSanitizer host allowlist bypass](https://junglewise.ai/threats/cve-2026-118517-the-symfony-htmlsanitizer-component-urlsanitizer-parses-urls) (medium, CVSS 4.3, published 5 Nov 2026)
- [CVE-2026-121373: Symfony HtmlSanitizer meta refresh URL sanitization bypass](https://junglewise.ai/threats/cve-2026-121373-the-symfony-htmlsanitizer-component) (info, published 4 Nov 2026)
- [CVE-2026-48761: Symfony HtmlSanitizer XSS via incomplete URL attribute sanitization](https://junglewise.ai/threats/cve-2026-48761-symfony-htmlsanitizer-xss-via-incomplete-url-attribute) (medium, CVSS 4, published 14 Jul 2026)
- [CVE-2026-48760: Symfony HtmlSanitizer visual spoofing via percent-encoded BiDi characters](https://junglewise.ai/threats/cve-2026-48760-symfony-htmlsanitizer-visual-spoofing-via-percent-encoded-bidi) (medium, CVSS 0, published 14 Jul 2026)
- [CVE-2026-45753: Symfony HtmlSanitizer XSS via incomplete URL attribute list](https://junglewise.ai/threats/cve-2026-45753-symfony-htmlsanitizer-xss-via-incomplete-url-attribute-list) (medium, CVSS 4, published 14 Jul 2026)
- [CVE-2026-45064: Symfony HtmlSanitizer visual spoofing via BiDi override characters](https://junglewise.ai/threats/cve-2026-45064-symfony-htmlsanitizer-visual-spoofing-via-bidi-override) (medium, CVSS 4, published 14 Jul 2026)
- [CVE-2026-45066: Symfony HtmlSanitizer URL allowlist bypass in URL parser](https://junglewise.ai/threats/cve-2026-45066-symfony-htmlsanitizer-url-allowlist-bypass-in-url-parser) (medium, CVSS 0, published 14 Jul 2026)
- [CVE-2025-29771: Jitbit HtmlSanitizer XSS in contentEditable handling](https://junglewise.ai/threats/cve-2025-29771-jitbit-htmlsanitizer-xss-in-contenteditable-handling) (medium, CVSS 4, published 14 Mar 2025)

## Most severe Symfony HtmlSanitizer vulnerabilities

- [CVE-2026-118517: Symfony HtmlSanitizer UrlSanitizer host allowlist bypass](https://junglewise.ai/threats/cve-2026-118517-the-symfony-htmlsanitizer-component-urlsanitizer-parses-urls) (medium, CVSS 4.3, published 5 Nov 2026)
- [CVE-2025-29771: Jitbit HtmlSanitizer XSS in contentEditable handling](https://junglewise.ai/threats/cve-2025-29771-jitbit-htmlsanitizer-xss-in-contenteditable-handling) (medium, CVSS 4, published 14 Mar 2025)
- [CVE-2026-48761: Symfony HtmlSanitizer XSS via incomplete URL attribute sanitization](https://junglewise.ai/threats/cve-2026-48761-symfony-htmlsanitizer-xss-via-incomplete-url-attribute) (medium, CVSS 4, published 14 Jul 2026)
- [CVE-2026-45753: Symfony HtmlSanitizer XSS via incomplete URL attribute list](https://junglewise.ai/threats/cve-2026-45753-symfony-htmlsanitizer-xss-via-incomplete-url-attribute-list) (medium, CVSS 4, published 14 Jul 2026)
- [CVE-2026-45064: Symfony HtmlSanitizer visual spoofing via BiDi override characters](https://junglewise.ai/threats/cve-2026-45064-symfony-htmlsanitizer-visual-spoofing-via-bidi-override) (medium, CVSS 4, published 14 Jul 2026)
- [CVE-2026-48760: Symfony HtmlSanitizer visual spoofing via percent-encoded BiDi characters](https://junglewise.ai/threats/cve-2026-48760-symfony-htmlsanitizer-visual-spoofing-via-percent-encoded-bidi) (medium, CVSS 0, published 14 Jul 2026)
- [CVE-2026-45066: Symfony HtmlSanitizer URL allowlist bypass in URL parser](https://junglewise.ai/threats/cve-2026-45066-symfony-htmlsanitizer-url-allowlist-bypass-in-url-parser) (medium, CVSS 0, published 14 Jul 2026)
- [CVE-2026-121949: Symfony HtmlSanitizer media URL policy bypass in srcset attributes](https://junglewise.ai/threats/cve-2026-121949-the-symfony-htmlsanitizer-component-does-not-apply-the-media-url) (info, published 5 Nov 2026)
- [CVE-2026-121373: Symfony HtmlSanitizer meta refresh URL sanitization bypass](https://junglewise.ai/threats/cve-2026-121373-the-symfony-htmlsanitizer-component) (info, published 4 Nov 2026)

## Vulnerabilities per week

3 vulnerabilities in the last four weeks, up from none in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 3 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Symfony technologies

- [Symfony Yaml Component](https://junglewise.ai/threats/technologies/yaml): 8 vulnerabilities
- [Symfony Security HTTP](https://junglewise.ai/threats/technologies/security-http): 5 vulnerabilities
- [Symfony UX Live Component](https://junglewise.ai/threats/technologies/ux-live-component): 4 vulnerabilities
- [Symfony Http Foundation](https://junglewise.ai/threats/technologies/http-foundation): 3 vulnerabilities
- [Symfony HttpClient](https://junglewise.ai/threats/technologies/httpclient): 3 vulnerabilities
- [Symfony Mime](https://junglewise.ai/threats/technologies/mime): 3 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Symfony HtmlSanitizer vulnerabilities", https://junglewise.ai/threats/technologies/htmlsanitizer, 13 November 2026.