CVE-2025-51471 Ollama vulnerable to Cross-Domain Token Exposure
Remote attackers can steal authentication tokens via a malicious realm value, enabling access control bypass and data exposure in Ollama.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-51471?
CVE-2025-51471 is a medium-severity vulnerability in n/a, published on 22 Jul 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Cross-Domain Token Exposure in server.auth.getAuthorizationToken in Ollama 0.6.7 allows remote attackers to steal authentication tokens and bypass access controls via a malicious realm value in a WWW-Authenticate header returned by the /api/pull endpoint.
Which versions are affected by CVE-2025-51471?
3 open source packages ship an affected version, including github.com/ollama/ollama. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/ollama/ollama Go | All versions | None |
github.com/ollama/ollama Go | All versions to 0.9.6 | None |
github.com/ollama/ollama Go | All versions to 0.9.6 | None |
Products include Ollama Ollama.
How do I fix CVE-2025-51471?
Upgrade to a fixed version.
Is CVE-2025-51471 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-51471 exists.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
- CVE-2025-63389 Ollama Platform has missing authentication enabling attackers to perform model management operations
- CVE-2024-45436 Ollama can extract members of a ZIP archive outside of the parent directory
- CVE-2026-7482 Ollama heap out-of-bounds read in GGUF tensor parsing leaks server process memory to unauthenticated remote attackers
- CVE-2024-37032 Ollama does not validate the format of the digest (sha256 with 64 hex digits)
- CVE-2025-15514 Ollama Multi-Modal Model Image Processing NULL Pointer Dereference
Sources
Also known as CLEANSTART-2026-OA88832, GHSA-x9hg-5q6g-q3jr, GO-2025-3824, MINI-265x-xh5q-74hg.