CVE-2026-113656 json
ApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoS
published 20d ago modified 19d ago also GHSA-89mh-mm8c-mv7f , EUVD-2026-105185
- cvss
- 5.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 40%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm @apostrophecms/form 1.5.5
Is CVE-2026-113656 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 19d ago
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
| GitHub | 3.1 | 5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | @apostrophecms/form | <1.5.5 |
1.5.5 |
Affected products
- apostrophecms apostrophe
- @apostrophecms form
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
github.com
/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce
web
-
github.com
/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350
web
-
github.com
/apostrophecms/apostrophe/security/advisories/GHSA-89mh-mm8c-mv7f
web
-
github.com
/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5
web
-
github.com
/apostrophecms/apostrophe
package
Sources
- CVE List CVE-2026-113656
- GitHub Advisory GHSA-89mh-mm8c-mv7f
- NVD CVE-2026-113656
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.