Vulnerability in Ifuryst Open-Computer-Use
CVE-2026-108721
Open Computer Use through 1.0.0 on macOS contains an improper case sensitivity handling vulnerability that allows local MCP callers to bypass the password-manager denylist using case-variant bundle identifiers. Attackers, including prompt-injected model turns, can pass identifiers like com.1Password.1Password to get_app_state and action tools to read accessibility trees, capture screenshots, and drive unlocked password manager interfaces.
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@haind/rJHI_S6IiMl (third-party-advisory)
- github.com/iFurySt/open-codex-computer-use/blob/8a3a7dec06402db2d760368cb24676a… (technical-description)
- github.com/iFurySt/open-codex-computer-use/blob/8a3a7dec06402db2d760368cb24676a… (technical-description)
- github.com/iFurySt/open-codex-computer-use (product)
- www.vulncheck.com/advisories/open-computer-use-through-1.0.0-denylist-bypass-vi… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-108721?
- CVE-2026-108721 is a medium-severity vulnerability in Ifuryst Open-Computer-Use, classified under Improper Handling of Case Sensitivity. CVSS score: 5.3/10. Published 2026-10-11.
- How severe is CVE-2026-108721?
- Medium severity. CVSS v3 base score is 5.3 out of 10.