Summarize contains a path traversal vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

7.1 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-45242: 0.40% estimated exploitation activity in the next 30 days; percentile 33.90 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summarize prior to 0.15.0 contains a path traversal vulnerability in the /v1/summarize daemon endpoint that allows authenticated callers to write files to arbitrary directories by supplying an absolute path or directory traversal sequence in the slidesDir request parameter. Attackers can exploit this to write slide.png and slides.json files to any writable directory and subsequently delete matching files at the specified location through repeat extraction.

Published by the source

18 May 2026, 21:31 UTC

Last modified by the source

10 Sep 2026, 03:51 UTC

Source last checked

26 Oct 2026, 12:52 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-8jr4-6r33-phwm

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-8jr4-6r33-phwm

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# Patch Next advisory brief: CVE-2026-45242

Advisory: Summarize contains a path traversal vulnerability
IDs: CVE-2026-45242, GHSA-8jr4-6r33-phwm
Record: https://patchnext.com/advisories/cve-2026-45242 (revision 3, source checked 26 Oct 2026, 12:52 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @steipete/summarize 0.15.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @steipete/summarize: affected < 0.15.0; fixed in 0.15.0

## Suggested inspection (read-only)
- `npm ls @steipete/summarize --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @steipete/summarize.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-8jr4-6r33-phwm (OSV record GHSA-8jr4-6r33-phwm lists affected ranges: npm @steipete/summarize >=0 <0.15.0 (fixed))
- Verified: https://github.com/advisories/GHSA-8jr4-6r33-phwm (GitHub-reviewed advisory GHSA-8jr4-6r33-phwm lists affected ranges: npm @steipete/summarize >=0 <0.15.0)

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