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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-918"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55421.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "00b7c3ce418b487c5696b064fc5033594b045e75"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "00b7c3ce418b487c5696b064fc5033594b045e75"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
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}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "c9831c2c9f53b7aa9a61d80e6d91a9941ce52ec6"
}
],
"source": "REFERENCES_COMMIT"
}
]
}