CVE-2026-45245: @steipete/summarize Summarize's Hover Summary Feature Allows Vulnerability

MODERATE
Advisory Identifier: GHSA-2r69-qgv3-hr65
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CVSS 7.4
CWE-918
Published
Advisory Summary

CVE-2026-45245 is a MODERATE (CVSS 7.4) summarize's hover summary feature allows vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting @steipete/summarize libraries in the npm ecosystem. The issue involves summarize's hover summary feature allows malicious pages to dispatch synthetic mouseover events over attacker-controlled links. Remediation is available by upgrading affected packages to version 0.15.1.

CVE-2026-45245 at a Glance

CVE Identifier CVE-2026-45245
GHSA Identifier GHSA-2r69-qgv3-hr65
Severity MODERATE
CVSS v3.1 Base Score 7.4
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product @steipete/summarize
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.4

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction Required (UI:R)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-45245

To remediate this vulnerability, upgrade all affected @steipete/summarize dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

@steipete/summarize fixed: 0.15.1 
npm install @steipete/summarize@0.15.1
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls @steipete/summarize

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-45245, inspect your project dependencies using npm:

npm ls @steipete/summarize

Analyze the terminal output to locate any version of @steipete/summarize in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.15.1), your application is affected.

Note: The npm ls @steipete/summarize command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In @steipete/summarize, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

Summarize prior to 0.15.0 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.

CVE-2026-45245 Affected @steipete/summarize Versions

1 component(s)
Fixed Versions:
0.15.1
Product / Package Ecosystem Affected Versions Fixed Version
@steipete/summarize
npm/@steipete/summarize
npm
< 0.15.1
0.15.1

References

NVD — CVE-2026-45245 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-45245
@steipete/summarize Source Repository REPOSITORY
https://github.com/steipete/summarize/pull/218
Security Fix Commit FIX COMMIT
https://github.com/steipete/summarize/commit/ecbb2c414255aa480a15d0d8b205224c14cfdbcb
@steipete/summarize Source Repository REPOSITORY
https://github.com/steipete/summarize
@steipete/summarize Release RELEASE
https://github.com/steipete/summarize/releases/tag/v0.15.1
@steipete/summarize Release RELEASE
https://github.com/steipete/summarize/releases/tag/v0.15.2
www.vulncheck.com/advisories/summariz... WEB
https://www.vulncheck.com/advisories/summarize-unauthorized-daemon-request-via-untrusted-events

Frequently Asked Questions

What is CVE-2026-45245?
CVE-2026-45245 is a security vulnerability in @steipete/summarize involving Summarize's hover summary feature allows malicious pages to dispatch synthetic mouseover events over attacker-controlled links under CWE-918: Server-Side Request Forgery (SSRF).
Which @steipete/summarize versions are affected?
Affected versions include releases prior to 0.15.1 across affected packages: @steipete/summarize.
What version fixes CVE-2026-45245?
Upgrading to 0.15.1 (or the latest patched release for your respective branch) resolves the vulnerability.
Is @steipete/summarize affected?
Yes, @steipete/summarize is affected in releases prior to 0.15.1. Upgrade your dependency to 0.15.1 or later.
What is the CVSS score of CVE-2026-45245?
CVE-2026-45245 has a CVSS v3.1 base score of 7.4 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N.
What CWE is associated with CVE-2026-45245?
CVE-2026-45245 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check npm dependencies for CVE-2026-45245?
Run the dependency tree command: 'npm ls @steipete/summarize'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2r69-qgv3-hr65",
  "modified" : "2026-05-29T20:00:00Z",
  "published" : "2026-05-18T21:31:51Z",
  "aliases" : [ "CVE-2026-45245" ],
  "summary" : "Summarize's hover summary feature allows malicious pages to dispatch synthetic mouseover events over attacker-controlled links",
  "details" : "Summarize prior to 0.15.0 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.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@steipete/summarize"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.15.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-45245"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/steipete/summarize/pull/218"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/steipete/summarize/commit/ecbb2c414255aa480a15d0d8b205224c14cfdbcb"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/steipete/summarize"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/steipete/summarize/releases/tag/v0.15.1"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/steipete/summarize/releases/tag/v0.15.2"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/summarize-unauthorized-daemon-request-via-untrusted-events"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-29T20:00:00Z",
    "nvd_published_at" : "2026-05-18T20:16:38Z"
  }
}