GHSA-69x8-hrgq-fjj8 LiteLLM: Password hash exposure and pass-the-hash authentication bypass
Authenticated users can steal password hashes and bypass authentication to escalate privileges and take over accounts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-69x8-hrgq-fjj8?
GHSA-69x8-hrgq-fjj8 is an authentication bypass vulnerability in litellm, published on 8 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Impact
Three issues combine into a full authentication bypass chain:
- Weak hashing: User passwords are stored as unsalted SHA-256 hashes, making them vulnerable to rainbow table attacks and trivially identifying users with identical passwords.
- Hash exposure: Multiple API endpoints (/user/info, /user/update, /spend/users) return the password hash field in responses to any authenticated user regardless of role. Plaintext passwords could also potentially be exposed in certain scenarios.
- Pass-the-hash: The /v2/login endpoint accepts the raw SHA-256 hash as a valid password without re-hashing, allowing direct login with a stolen
An already authenticated user can retrieve another user's password hash from the API and use it to log in as that user. This enables full privilege escalation in three HTTP requests.
Patches
Fixed in v1.83.0. Passwords are now hashed with scrypt (random 16-byte salt, n=16384, r=8, p=1). Password hashes are stripped from all API responses. Existing SHA-256 hashes are transparently migrated on next login.
Which versions are affected by GHSA-69x8-hrgq-fjj8?
2 open source packages ship an affected version, including litellm.
| Package | Affected | Fixed in |
|---|---|---|
litellm PyPI | All versions | 1.83.0 |
litellm PyPI | All versions | 1.83.0 |
How do I fix GHSA-69x8-hrgq-fjj8?
Upgrade litellm to 1.83.0 or later.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is GHSA-69x8-hrgq-fjj8 being exploited?
There is no known exploitation of GHSA-69x8-hrgq-fjj8 in the wild and no public exploit code.