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CVE-2026-91725 is a medium-severity observable-discrepancy vulnerability in CSS in Google Chrome versions prior to 153.0.8010.47. A remote attacker can use a crafted HTML page to distinguish otherwise non-observable browser behavior and leak sensitive information.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Medium-severity observable-discrepancy vulnerability in Chrome CSS.
A Medium-severity observable-discrepancy vulnerability in Chrome CSS.
A medium-severity CSS observable-discrepancy information-leak vulnerability in Google Chrome prior to version 153.0.8010.47. A remote attacker can use a crafted HTML page to leak sensitive information.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.