CVE-2026-87537: Missing Authorization in Chrome Extensions Prior to 153.0.8010.36 Allows Arbitrary Code Execution Outside Sandbox
A NVD · · CVE-2026-87537
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
This vulnerability requires a prior successful renderer process compromise as a prerequisite and is thus more of a follow-up step in a multi-stage attack than a direct initial compromise vector.
Description
CVE-2026-87537 describes a missing authorization vulnerability in Chrome extensions prior to version 153.0.8010.36. The vulnerability allows an attacker who has already compromised the renderer process to potentially execute arbitrary code outside the sandbox via crafted network traffic. The Chromium security team rates this vulnerability as medium severity. Exploitation requires that an initial compromise point already exists.
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