CVE-2026-87611: Missing Authorization in FileSystem in Google Chrome Prior to 153.0.8010.36
A NVD · · CVE-2026-87611
Admiralty grading (A–F · 1–6)
Source reliability
- A Completely reliable
- B Usually reliable
- C Fairly reliable
- D Not usually reliable
- E Unreliable
- F Cannot be judged
Information credibility
- 1 Confirmed
- 2 Probably true
- 3 Possibly true
- 4 Doubtful
- 5 Improbable
- 6 Cannot be judged
NATO Admiralty (AJP-2.1) grades confidence, independent of the risk score. Cross-source corroboration isn't tracked for non-CVE news, so single-source items are capped at a lower credibility number; a low number does not imply low quality.
Key metrics
- EPSS
- 0%
Key insight
A vulnerability in the renderer process allows an attacker with a compromised renderer to access cross-origin data via crafted HTML; however, prior renderer compromise is a prerequisite.
Description
CVE-2026-87611 is an authorization bypass vulnerability in the FileSystem API of Google Chrome prior to version 153.0.8010.36. A remote attacker who has already compromised the renderer process can access cross-origin data via a crafted HTML page. The Chromium security team rates the vulnerability as medium severity. The flaw requires prior renderer process compromise as a necessary precondition.
Risk score
- cvss base
- 0.00
- kev bonus
- 0.00
- epss bonus
- 0.00
- poc bonus
- 0.00
- raw before weight
- 0.00
- industry weight
- 1.21
- freshness factor
- 1.00
- exploitability factor
- 1.00
- days old
- 0.00
- vendor mismatch penalty
- 0.00
Path: operational