Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
ApostropheCMS versions before 4.33.0 leave rejected CSV import uploads in the operating system temporary directory, because the rich-text widget's upload route does not delete the Multer temporary file when the extension check fails. An unauthenticated remote attacker who can obtain a normal CSRF cookie can repeat requests with large files to fill the temporary disk partition, which may disrupt Apostrophe and other services on the host. The fix is to upgrade the apostrophe npm package to 4.33.0 or later.
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 |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0062, the 49th percentile, on 6 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
- GitHub Advisory Database: GHSA-qhcq-9pm2-c9w9
- OSV: GHSA-qhcq-9pm2-c9w9
- github.com/apostrophecms/apostrophe/security/advisories/GHSA-qhcq-9pm2-c9w9
- github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce
- github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350
- github.com/apostrophecms/apostrophe
- github.com/apostrophecms/apostrophe/releases/tag/[email protected]