GHSA-89mh-mm8c-mv7f: @apostrophecms/form (CVE-2026-113656)

Package	Ecosystem	Affected	Fixed in
@apostrophecms/form	npm	<1.5.5	1.5.5

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Versions of the @apostrophecms/form npm package before 1.5.5 are affected. The form submission endpoint processes multipart uploads before any authentication, API-key, or form-existence checks, and sets no size, count, or rate limits. An unauthenticated remote client can send large request bodies that are written to the temporary directory, which can exhaust disk space and slow the server; the source notes that cleanup happens only after the full body is received. The fix is to upgrade @apostrophecms/form to version 1.5.5 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
5.3	Medium	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0046, the 40th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 13:33 UTC First seen by agentprime
31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.