CVE-2026-45245

Description

Summarize prior to 0.15.1 contains a vulnerability in the hover summary feature that allows malicious pages to dispatch synthetic mouseover events over attacker-controlled links, causing the extension to make authenticated daemon requests using stored tokens without verifying event trustworthiness. Attackers can place local or private-network URLs behind hoverable links to route authenticated requests through the daemon, potentially accessing sensitive internal endpoints when users interact with attacker-controlled content.

CVSS v3.1 Score

7.4

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0033

Probability of exploitation

0.25%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-918 Server-Side Request Forgery (SSRF)

CWE-940 CWE-940

Affected Products

Vendor	Product	Versions
steipete	summarize	< 0.15.1

References

Advisories & Patches

https://github.com/steipete/summarize/commit/ecbb2c414255aa480a15d0d8b205224c14cfdbcb https://github.com/steipete/summarize/pull/218 https://github.com/steipete/summarize/pull/218

Exploits

https://github.com/steipete/summarize/pull/218 https://github.com/steipete/summarize/pull/218

Other References

https://github.com/steipete/summarize/releases/tag/v0.15.2 https://www.vulncheck.com/advisories/summarize-unauthorized-daemon-request-via-untrusted-events

Frequently Asked Questions

What is CVE-2026-45245? +

Summarize prior to 0.15.1 contains a vulnerability in the hover summary feature that allows malicious pages to dispatch synthetic mouseover events over attacker-controlled links, causing the extension to make authenticated daemon requests using stored tokens without verifying event trustworthiness. Attackers can place local or private-network URLs behind hoverable links to route authenticated requests through the daemon, potentially accessing sensitive internal endpoints when users interact with attacker-controlled content. It has a CVSS v3.1 base score of 7.4 (HIGH).

How severe is CVE-2026-45245? +

CVE-2026-45245 has a CVSS v3.1 score of 7.4 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0033, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-45245? +

CVE-2026-45245 affects products from steipete, specifically: summarize. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-45245? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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