CVE-2026-55421 json
Open edX Platform: SSRF in Studio Video Download Endpoint
published 2026-09-02 2 mo ago modified 2026-09-09 1 mo ago also EUVD-2026-70223
- cvss
- 6.8
- 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
Open edX Platform enables the authoring and delivery of online learning at any scale. Prior to commit 00b7c3c, the endpoint accepts user-supplied files[].url, performs a server-side fetch using "requests.get(url, allow_redirects=True)". The fetched bytes are then returned inside a ZIP response. This enables SSRF with response exfiltration. Redirect-following is enabled, and there is no timeout in the vulnerable fetch path. This issue has been patched via commit 00b7c3c.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.46% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.8 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N |
Affected products
- openedx openedx-platform
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
- github.com /openedx/openedx-platform/commit/00b7c3ce418b487c5696b064fc5033594b045e75
- github.com /openedx/openedx-platform/commit/241b914a191ec24658b9cde75a7114db40a5d53a
- github.com /openedx/openedx-platform/commit/c9831c2c9f53b7aa9a61d80e6d91a9941ce52ec6
- github.com /openedx/openedx-platform/security/advisories/GHSA-fpf9-9rpr-jvrx
Sources
- CVE List CVE-2026-55421
- NVD CVE-2026-55421
Fencer Vulns 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.