How severe is CVE-2026-45245?

CVE-2026-45245 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-45245 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45245?

CVE-2026-45245 affects Steipete Summarize. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45245?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-45245 have an EU (EUVD) identifier?

Yes. CVE-2026-45245 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30795.

When was CVE-2026-45245 published?

CVE-2026-45245 was published on 2026-05-18 and last updated on 2026-06-17.

CVE-2026-45245

CVE-2026-45245 is a high-severity vulnerability in Steipete Summarize with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 7.4)
CVSS v4: 4.6
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30795
Weakness: CWE-918
Affected product: Steipete Summarize
Published: 2026-05-18
Last modified: 2026-06-17

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.

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.
How severe is CVE-2026-45245?: CVE-2026-45245 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-45245 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45245?: CVE-2026-45245 affects Steipete Summarize. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45245?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-45245 have an EU (EUVD) identifier?: Yes. CVE-2026-45245 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30795.
When was CVE-2026-45245 published?: CVE-2026-45245 was published on 2026-05-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:steipete:summarize:*:*:*:*:*:*:*:*

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