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How CVE-2026-11182 Works
CVE-2026-11182 is a medium-severity vulnerability in Google Chrome’s SVG engine that allows a remote attacker to leak cross-origin data via a specially crafted HTML page. The vulnerability stems from an inappropriate implementation in how Chrome handles certain SVG filter elements when they use the CSS `currentColor` keyword as a color input.
Specifically, SVG filters such as feDiffuseLighting, feDropShadow, feFlood, and `feSpecularLighting` failed to properly “taint” colors derived from currentColor. This oversight allows an attacker to abuse the browser’s mechanism for styling visited links. By embedding a malicious SVG filter on a webpage, the attacker can manipulate the filter’s color output to infer whether a victim has visited a particular URL.
The attack chain works as follows: the attacker’s page uses the SVG filter to query the color value of a link. If the link has been visited, the browser applies a distinct color (e.g., purple for visited links). Because the vulnerable SVG filter processes `currentColor` without proper taint tracking, it inadvertently leaks this color information back to the attacker, enabling them to determine the link’s visited status. Since this mechanism works for any link, it can be used to scan a wide range of origins, effectively allowing cross-origin data leakage.
The vulnerability requires no authentication or privileged code execution; the attacker only needs to lure a victim to a malicious HTML page. The confidentiality impact is high, as it can expose sensitive browsing history and potentially other cross-origin data.
DailyCVE Form
Platform: Google Chrome
Version: Before 149.0.7827.53
Vulnerability : SVG Filter Leak
Severity: Medium (CVSS 6.5)
Date: 2026-06-04
Prediction: Patch 2026-06-04
Analytics
What Undercode Say:
Check Chrome version
google-chrome --version
Expected output if vulnerable: Google Chrome 149.0.7827.53 or lower
If version < 149.0.7827.53, system is vulnerable
Verify fixed version
google-chrome --version | grep -q "149.0.7827.53"
if [ $? -eq 0 ]; then
echo "Patched: Version 149.0.7827.53 or higher detected"
else
echo "VULNERABLE: Please update immediately"
fi
Simulate detection using JavaScript (conceptual)
cat > test_cve_2026_11182.html << EOF
<html>
<body>
<script>
// PoC concept: Attempt to leak visited link state via SVG filter
const link = document.createElement('a');
link.href = 'https://victim.example.com/secret';
link.style.color = 'currentColor';
document.body.appendChild(link);
// ... SVG filter logic to detect color changes ...
</script>
</body>
</html>
EOF
echo "PoC saved to test_cve_2026_11182.html"
Exploit:
- Attacker hosts a malicious HTML page containing an SVG with a vulnerable filter (e.g.,
feDiffuseLighting). - The SVG filter uses `currentColor` as a color input, referencing a link element’s style.
- Victim visits the attacker’s page, triggering the SVG filter processing.
- The filter’s output color changes based on whether the link is unvisited (blue) or visited (purple).
- Attacker measures the final rendered color via canvas or CSS properties, deducing the visited state.
- By iterating over a list of target URLs, the attacker maps out the victim’s entire browsing history across origins.
Protection:
- Immediate Update: Upgrade Google Chrome to version 149.0.7827.53 or later.
- Enterprise Policy: Disable or restrict SVG rendering for untrusted content if an immediate update is not possible.
- Web Filtering: Block access to known malicious domains and enforce strict cross-origin resource loading policies.
- Browser Hardening: Enable site isolation and use security extensions that limit cross-origin data leakage.
Impact:
- Confidentiality Breach: Attackers can leak sensitive browsing history, including visited URLs from any origin, potentially exposing private user activities.
- Cross-Origin Data Theft: The flaw can be abused to exfiltrate data from other web applications the user is logged into, such as internal corporate portals or social media.
- No Authentication Required: The attack works remotely without any privileges, making it highly accessible to malicious actors.
- Widespread Risk: All Chrome users prior to version 149.0.7827.53 are vulnerable, affecting millions of installations.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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