Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0 until 6.4.41, 7.4.13, and 8.0.13, UrlAttributeSanitizer::getSupportedAttributes() omitted URL-bearing attributes on , , , and , and URLs inside content bypassed URL sanitization, allowing explicitly enabled elements or attributes to pass javascript: and similar payloads into sanitized output. This issue is fixed in versions 6.4.41, 7.4.13, and 8.0.13.
CVE-2026-48761
MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 81% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, nvd
6.1
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.1Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 6.1
- EG Score
- 6.1(medium)
- EPSS
- 18.7%
- KEV
- Not listed
Published
June 15, 2026
Last Modified
July 21, 2026
Advisory Details (1)
Auto-updated Jul 16, 2026Patch available. Sources: github.
github Patch Available
HtmlSanitizer UrlAttributeSanitizer Misses URL Attributes on <object>, <applet>, <iframe>, <img> and the URL Inside <meta http-equiv="refresh"> content · Advisory · symfony/symfony · GitHub
https://github.com/symfony/symfony/security/advisories/GHSA-x5qj-865h-mgvmVendor Advisories for CVE-2026-48761(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(2 across 1 ecosystem)
Packagist(2)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| symfony/html-sanitizer | v8.0.0, v8.0.12, v8.0.7, v8.0.8 | 8.0.13 | — |
| symfony/symfony | v8.0.0 ... v8.0.9 (13 versions) | 8.0.13 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 7× in last 7d / 12× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 02:29 UTCEPSS rescore
- 2026-07-18 10:04 UTCEPSS rescore
- 2026-07-16 17:03 UTCEPSS rescore
- 2026-07-15 19:48 UTCEG score recompute▲ 0.80
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 16:23 UTCNVD updateCVSS v3 → 6.1
- 2026-07-14 19:35 UTCEG score recompute▲ 5.30
- 2026-07-14 19:31 UTCMITRE cvelistV5CVSS v3 → 5.3 · CVSS v4 → 5.3
- 2026-06-15 17:16 UTCEG score recompute
Frequently asked(5)
What is CVE-2026-48761?
CVE-2026-48761 is a medium vulnerability published on June 15, 2026. Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 6.1.0 until 6.4.41, 7.4.13, and 8.0.13, UrlAttributeSanitizer::getSupportedAttributes() omitted URL-bearing attributes on <object>, <applet>, <iframe>, and <img>, and <meta http-equiv="refresh">…
When was CVE-2026-48761 disclosed?
CVE-2026-48761 was first published in the National Vulnerability Database on June 15, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48761 actively exploited?
CVE-2026-48761 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 18.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48761?
CVE-2026-48761 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-48761?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48761, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-48761
Is Your Infrastructure Affected by CVE-2026-48761?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.