CVE-2026-126934

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/diced/zipline/blob/v4.7.0/src/server/index.ts#L58-L62
https://github.com/diced/zipline/blob/v4.7.0/src/server/startup/plugins.ts#L70-L73
https://github.com/diced/zipline/commit/6bac7e6bb18cb37c1d09f91306c1ffbdca00097c
https://github.com/diced/zipline/releases/tag/v4.8.0
https://github.com/diced/zipline/security/advisories/GHSA-v938-v8wg-9497
https://www.vulncheck.com/advisories/zipline-4.3.2-before-4.8.0-rate-limit-bypass-via-spoofed-x-forwarded-for