Patch Forecast
Yellow warning
Plan into this sprint.

CVE-2026-113656 · GHSA-89mh-mm8c-mv7f

ApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoS

Risk score
45/100
CVSS
5.3 v3.1
Exploit chance (30 days)
0.5%
Published
20 Oct 2026

Open in the live forecast Today's forecast

What to know

What it is
ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the ApostropheCMS Form add-on, its form submission route stages unbounded multipart uploads before form validation or authentication and lacks upload size, count, and rate limits. Repeated unauthenticated submissions can consume tempo…
Affected
@apostrophecms/form (npm) < 1.5.5
Fix
Upgrade @apostrophecms/form to 1.5.5 or later.
Exploitation
No known exploitation

Story map

Story map: @apostrophecms/formTHE FLAWSTHE FIXCVE-2026-113656ApostropheCMS:Unauthenticated unboundedmultipart upload →…CVSS 5.3 · EPSS 0%CVE-2026-113667ApostropheCMS: CAPTCHAresponse token notURL-encodedCVSS 5.3 · EPSS 0%Upgrade…1.5.5or later on your release lineWho is exposed@apostrophecms/form (npm) <1.5.5YELLOW · PLAN IT IN@apostrophecms/formApostropheCMS is anopen-source Node.js contentmanagement system. Prior to1.5.5 of the ApostropheCMSForm add-on, its formsubmission route stagesunbounded multipart uploads…Where it standsNo known exploitationCONNECTS TOSame weaknessDenial of service (CWE-770)206 other warnings in 30 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

@apostrophecms/form: Yellow, plan it in. ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the ApostropheCMS Form add-on, its form submission route stages unbounded multipart uploads before form validation or authentication and lacks upload size, count, and rate limits. Repeated unauthenticated submissions can consume tempo…

The flaws

  • CVE-2026-113656: ApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoS (CVSS 5.3 · EPSS 0%)
  • CVE-2026-113667: ApostropheCMS: CAPTCHA response token not URL-encoded (CVSS 5.3 · EPSS 0%)

The fix

Upgrade @apostrophecms/form: 1.5.5 or later on your release line

Who is exposed: @apostrophecms/form (npm) < 1.5.5

Where it stands

  • No known exploitation

Connects to

Why it is Yellow

  • CVSS 5.3 medium
  • On your watchlist: npm

Affected packages

PackageEcosystemVulnerableFixed in
@apostrophecms/formnpm< 1.5.51.5.5

References

Original description

ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the ApostropheCMS Form add-on, its form submission route stages unbounded multipart uploads before form validation or authentication and lacks upload size, count, and rate limits. Repeated unauthenticated submissions can consume temporary disk storage and disrupt form handling or other host services. This issue is fixed in ApostropheCMS Form 1.5.5.

Last activity 20 Oct 2026. Patch Forecast updates every hour.