Zipline 4.3.2 before 4.8.0 contains a rate limit bypass vulnerability that allows unauthenticated attackers to evade throttling by spoofing X-Forwarded-For headers when core.trustProxy is enabled. Attackers can send a different X-Forwarded-For value per request to obtain fresh rate-limit buckets, enabling unlimited guessing of login passwords, TOTP codes, and file and URL passwords.
{
"cna_assigner": "VulnCheck",
"cwe_ids": [
"CWE-348"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126934.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "4.3.2"
},
{
"fixed": "4.8.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"fixed": "6bac7e6bb18cb37c1d09f91306c1ffbdca00097c"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v4.8.0",
"range": [
{
"fixed": "bdee0e7250f7024ff9b4fcdcde71a9ef11a96b6d"
}
],
"source": "REFERENCES_TAG"
}
]
}