Low 2.1Published Jul 17, 2026

CVE-2026-48978oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens

Updated under an hour ago (Oct 26, 2026, 4:10 PM ET)

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Exploited in the last 30 days

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.

CVSS: 2.1 LOW (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-918, CWE-319
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Jul 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

oras-project oras-go oras_project:oras_go (from the name)	before 2.6.1	CNA record

References

References

https://github.com/oras-project/oras-go/security/advisories/GHSA-xf85-363p-868w	x-refsource-confirm
https://github.com/oras-project/oras-go/commit/7a9f4b0b9558821b0422152ebe21ae56930fe764	x-refsource-misc
https://github.com/oras-project/oras-go/releases/tag/v2.6.1	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.