Ollama vulnerable to Cross-Domain Token Exposure

published 2025-07-22 15 mo ago modified 2026-09-10 1 mo ago also GHSA-x9hg-5q6g-q3jr , GO-2025-3824 , PYSEC-2025-147 , EUVD-2025-22351

cvss: 6.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 18.5%; EPSS 18.5% chance of exploitation in 30 days, percentile 97%
public exploits: 0; none known

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.

Patch / fix

distros 1 links 1

govulncheck-vulndb openSUSE Tumbleweed 0.0.20250730T213748-1.1

opensuse advisories openSUSE-SU-2025:15405-1

github.com/ollama/ollama#10750 pull request

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-51471 updated 2026-02-06 cvss 3.4

ollama: Ollama token exposure

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 15 mo ago (2025-07-22)

Exploit prediction

18.53% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/ollama/ollama/pull/10750 referenced PoC, tagged "exploit" by a source, unverified
gecko.security https://www.gecko.security/blog/cve-2025-51471 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	6.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
CNA	3.1	6.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
GitHub	3.1	6.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
go	github.com/ollama/ollama	<=0.9.6 all versions	no fix listed

Classification

Weakness

CWE-384 Session Fixation
CWE-345 Insufficient Verification of Data Authenticity

References

github.com /ollama/ollama/pull/10750
web, exploit, issue-tracking, report, patch
gecko.security /blog/cve-2025-51471
web, exploit, third-party-advisory, evidence
github.com /ollama/ollama
package, product
huntr.com /bounties/94eea285-fd65-4e01-a035-f533575ebdc2
web
nvd.nist.gov /vuln/detail/CVE-2025-51471
advisory
github.com /pypa/advisory-database/tree/main/vulns/ollama/PYSEC-2025-147.yaml
web
github.com /advisories/GHSA-x9hg-5q6g-q3jr
advisory

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary