Low severity · published Jul 17, 2026
CVE-2026-48978
oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens
2.1
CVSS
0.2%
EPSS
No
On KEV
Description
oras-go is a Go library for managing OCI artifacts. Prior to 2.6.1, auth.Client follows the realm URL from a registry's WWW-Authenticate: Bearer challenge without validating the scheme or host, allowing a malicious or compromised registry to cause SSRF to internal networks such as http://169.254.169.254/, http://10.0.0.x/, and http://127.0.0.1/, or to downgrade a registry contacted over https:// to an http:// token endpoint in registry/remote/auth/client.go through Client.Do(), Client.fetchBearerToken(), fetchDistributionToken, and fetchOAuth2Token. This issue is fixed in version 2.6.1.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OR
oras-go · oras-project
< 2.6.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48978
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48978
github.com
https://github.com/oras-project/oras-go/commit/7a9f4b0b9558821b0422152ebe21ae56930fe764
github.com
https://github.com/oras-project/oras-go/releases/tag/v2.6.1
github.com
https://github.com/oras-project/oras-go/security/advisories/GHSA-xf85-363p-868w
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