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UBUNTU-CVE-2026-48761

0
High
Vulnerabilitygcveosvubuntu-cve-2026-48761ubuntu-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-pro-22-04-ltsubuntu-pro-24-04-ltsubuntu-25-10ubuntu-26-04-lts
Published: 07/14/2026 (07/14/2026, 20:17:00 UTC)
Source: GCVE Database
Product: symfony

Description

A vulnerability in the Symfony PHP framework versions from 6.1.0 up to but not including 6.4.41, 7.4.13, and 8.0.13 allows certain URL-bearing attributes on HTML elements like <object>, <applet>, <iframe>, <img>, and <meta http-equiv="refresh"> to bypass URL sanitization. This can result in javascript: and similar payloads passing into sanitized output. The issue is fixed in Symfony versions 6.4.41, 7.4.13, and 8.0.13.

CVSS v4.0

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
Passive
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
None
Subsq. Confidentiality
Low
Subsq. Integrity
Low
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Affected software

Ubuntu:16.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]?arch=source&distro=xenial
Affected versions
=2.7.1+dfsg-1=2.7.5+dfsg-1=2.7.9+dfsg-1=2.7.9+dfsg-1ubuntu2=2.7.10-0ubuntu2
Ubuntu:Pro:18.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu0.1+esm2?arch=source&distro=esm-apps/bionic
Affected versions
=2.8.7+dfsg-1.3ubuntu1=3.4.3+dfsg-1ubuntu4=3.4.6+dfsg-1=3.4.6+dfsg-1ubuntu0.1=3.4.6+dfsg-1ubuntu0.1+esm1=3.4.6+dfsg-1ubuntu0.1+esm2
Ubuntu:Pro:20.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1+esm2?arch=source&distro=esm-apps/focal
Affected versions
=4.3.4+dfsg-1ubuntu1=4.3.8+dfsg-1ubuntu1=4.3.8+dfsg-1ubuntu1+esm1=4.3.8+dfsg-1ubuntu1+esm2
Ubuntu:Pro:22.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu8+esm1?arch=source&distro=esm-apps/jammy
Affected versions
=5.2.6+dfsg-1ubuntu7=5.4.4+dfsg-1ubuntu8=5.4.4+dfsg-1ubuntu8+esm1
Ubuntu:Pro:24.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-3ubuntu3+esm1?arch=source&distro=esm-apps/noble
Affected versions
=5.4.23+dfsg-1ubuntu1=5.4.35+dfsg-3ubuntu1=6.4.5+dfsg-3ubuntu2=6.4.5+dfsg-3ubuntu3=6.4.5+dfsg-3ubuntu3+esm1
Ubuntu:25.10more threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1?arch=source&distro=questing
Affected versions
=6.4.18+dfsg-1ubuntu1=6.4.21+dfsg-2=6.4.21+dfsg-2ubuntu1=6.4.24+dfsg-1
Ubuntu:26.04:LTSmore threats →ghsa
symfony
pkg:deb/ubuntu/[email protected]+dfsg-1ubuntu1?arch=source&distro=resolute
Affected versions
=6.4.24+dfsg-1=7.4.5+dfsg-1ubuntu1=7.4.6+dfsg-2ubuntu1=7.4.7+dfsg-1ubuntu1

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 07/16/2026, 12:27:11 UTC

Technical Analysis

Symfony's UrlAttributeSanitizer::getSupportedAttributes() omitted URL-bearing attributes on specific HTML elements, causing URLs inside these elements to bypass sanitization. This vulnerability affects Symfony versions from 6.1.0 until 6.4.41, 7.4.13, and 8.0.13. The flaw allows explicitly enabled elements or attributes to pass potentially unsafe javascript: and similar payloads into sanitized output. The issue has been fixed in versions 6.4.41, 7.4.13, and 8.0.13.

Potential Impact

The vulnerability allows malicious javascript: and similar payloads to bypass URL sanitization in affected Symfony versions, potentially enabling injection of unsafe scripts into sanitized output. This could lead to cross-site scripting (XSS) or other client-side code injection attacks if exploited.

Mitigation Recommendations

A fix is available in Symfony versions 6.4.41, 7.4.13, and 8.0.13. Users should upgrade to these or later versions to remediate the vulnerability. No vendor advisory indicates that no action is required or that the issue is already mitigated by other means.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-48761
Osv Schema Version
1.7.0
Aliases
[]
Ecosystems
["Ubuntu:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:Pro:24.04:LTS","Ubuntu:25.10","Ubuntu:26.04:LTS"]
Database Specific Severity
null
Cvss Version
4.0

Threat ID: 6a58b49568715ace43da7e2f

Added to database: 07/16/2026, 10:38:13 UTC

Last enriched: 07/16/2026, 12:27:11 UTC

Last updated: 07/17/2026, 03:33:53 UTC

Views: 4

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