CVE-2026-45753Disclosure(sensiolabs / symfony)

LOWCVSS 6.1 · MEDIUM

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0-BETA1 until 6.4.40, 7.4.12, and 8.0.12, UrlAttributeSanitizer::getSupportedAttributes() omits URL-valued attributes including action, formaction, poster, and cite, so configurations that admit those attributes can leave javascript: URIs unsanitized and enable XSS when the resulting HTML is rendered or a victim submits a form or clicks a button. This issue is fixed in versions 6.4.40, 7.4.12, and 8.0.12.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-79CWE-184

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • symfony

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • Disclosure: 2 classified signals
  • Peaked 1d ago at 1 mentions (2026-06-15); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
Products
symfony

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-06-15: 1Mentions · 2026-07-15: 1Technical Details · 2026-06-15: 1Technical Details · 2026-07-15: 106-1507-15
Signal classification1 categories
Disclosure
2100.0%
Referenced assets2 URLs
Full discourse2 posts
  • DailyCVE@dailycve
    Disclosure

    🔵 Symfony HtmlSanitizer, Cross-site Scripting (XSS), #CVE-2026-45753 (Low) -DC-Jul2026-1005 https://dailycve.com/symfony-htmlsanitizer-cross-site-scripting-xss-cve-2026-45753-low-dc-jul2026-1005/

    Post summary

    CVE‑2026‑45753 is an XSS vulnerability in Symfony HtmlSanitizer reported with low severity; the post offers no PoC, exploit, patch, or evidence of active exploitation.

    0000050
    219 followersView on X
  • DailyCVE@dailycve
    Disclosure

    🟠 Symfony HtmlSanitizer, Multiple XSS Vulnerabilities (#CVE-2026-48761 & #CVE-2026-45753) (Medium) -DC-Jun2026-402 https://dailycve.com/symfony-htmlsanitizer-multiple-xss-vulnerabilities-cve-2026-48761-cve-2026-45753-medium-dc-jun2026-402/

    Post summary

    DailyCVE alerts about multiple Medium-rated XSS vulnerabilities in Symfony HtmlSanitizer (CVE-2026-48761 & CVE-2026-45753) but provides no PoC, exploit, or patch details.

    0000033
    212 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appsensiolabssymfony---

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