Internal resource disclosure via synthetic hover events
Published May 18, 2026 · Updated May 18, 2026
SSRF in Summarize before 0.15.1 allows remote attackers to read internal resources through authenticated hover-summary requests. The extension's mouseover listener accepted synthetic events, while its background hover controller forwarded attacker-selected local or private URLs to the daemon with a stored token. Exploitation requires the extension and daemon to be paired, hover summaries to be enabled, and a user to interact with attacker-controlled content; the reported impact is limited to confidentiality.
Summary
What happened
SSRF in Summarize before 0.15.1 allows remote attackers to read internal resources through authenticated hover-summary requests. The extension's mouseover listener accepted synthetic events, while its background hover controller forwarded attacker-selected local or private URLs to the daemon with a stored token. Exploitation requires the extension and daemon to be paired, hover summaries to be enabled, and a user to interact with attacker-controlled content; the reported impact is limited to confidentiality.
The record
- CVE
- CVE-2026-45245
- Published
- May 18, 2026
- Updated
- May 18, 2026
- Vendor
- Peter Steinberger
- Product
- Summarize
- Classifications
- CWE-918, CWE-940, T1189
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 18, 2026CVE publishedPublication date reported by the CVE source.
- May 18, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <0.15.1
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- Synthetic hover-event proof of concept and regression testsproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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