PatchTheCVECVE-2026-33877: ApostropheCMS is an open-source Node.js content management system
CVE-2026-33877 is a low-severity flaw (CVSS 3.7) affecting apostrophecms. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
ApostropheCMS is an open-source Node.js content management system. Versions 4.28.0 and prior contain a timing side-channel vulnerability in the password reset endpoint (/api/v1/@apostrophecms/login/reset-request) that allows unauthenticated username and email enumeration. When a user is not found, the handler returns after a fixed 2-second artificial delay, but when a valid user is found, it performs a MongoDB update and SMTP email send with no e
Why this priority
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 3.7 (Low) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 70%) |
| CISA exploited list | No |
| Weakness | CWE-208 |
| Published | 2026-04-15 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-33877?
apostrophecms: upgrade to 4.29.0. Exact commands for each OS are on this page.
Is CVE-2026-33877 being exploited?
CVE-2026-33877 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-33877 affect?
CVE-2026-33877 affects apostrophecms. Severity is low (CVSS 3.7). ApostropheCMS is an open-source Node.js content management system. Versions 4.28.0 and prior contain a timing side-channel vulnerability in the password reset endpoint (/api/v1/@apostrophecms/login/reset-request) that allows unauthenticated
How urgent is CVE-2026-33877?
Priority 30/100. Public exploit reference; Remotely exploitable, no login, no user action
Software pages
Node.js vulnerabilities · MongoDB vulnerabilities
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