CVE-2026-126934

Description

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.

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