CVE-2026-87639: Use After Free in WebPackaging in Google Chrome Prior to 153.0.8010.36
A NVD · · CVE-2026-87639
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 is a standard security patch notification with no evidence of active exploitation or specific campaigns; the vulnerability requires renderer compromise as a prerequisite.
Description
CVE-2026-87639 is a use-after-free vulnerability in the WebPackaging component of Google Chrome prior to version 153.0.8010.36. An attacker who has already compromised the renderer process could exploit this vulnerability to execute arbitrary code outside the browser sandbox. The vulnerability is rated High severity by Chromium. A prerequisite is prior compromise of the renderer process, which reduces the attack surface compared to direct remote code execution vulnerabilities.
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