Auth bypass in Steipete Summarize
CVE-2026-45244
Summarize prior to 0.15.1 contains a missing authorization vulnerability that allows attackers to execute browser automation actions without per-call user approval when the extension automation feature is enabled. Attackers can influence the agent through malicious page or summary content to invoke enabled extension automation tools such as navigation or debugger-backed actions, bypassing the final user approval step when a user interacts with attacker-controlled content.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (30.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
- Steipete Summarize — versions 0, e64fe3ecd1bb4fdc181dcfa88c96b9e1914ced0e
Weakness classification (CWE)
References
- github.com/steipete/summarize/releases/tag/v0.15.2 (release-notes, Release Notes)
- github.com/steipete/summarize/pull/219 (issue-tracking, Exploit, Patch, Issue Tracking)
- github.com/steipete/summarize/commit/e64fe3ecd1bb4fdc181dcfa88c96b9e1914ced0e (Patch, patch)
- www.vulncheck.com/advisories/summarize-unapproved-browser-automation-execution (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-45244?
- CVE-2026-45244 is a medium-severity vulnerability in Steipete Summarize, classified under Missing Authorization. CVSS score: 5.4/10. Published 2026-05-18.
- How severe is CVE-2026-45244?
- Medium severity. CVSS v3 base score is 5.4 out of 10.