CVE-2026-48978

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2026-48978
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48978.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-48978
Aliases
Downstream
CGA (661)
CLEANSTART (41)
DEBIAN (1)
ECHO (1)
MINI (194)
openSUSE (6)
SUSE (13)
UBUNTU (1)
Related
openSUSE (6)
SUSE (13)
Published
2026-07-17T19:34:53Z
Modified
2026-10-21T02:58:21Z
Severity
  • 2.1 (Low) CVSS_V4 - 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 CVSS Calculator
Summary
oras-go: Malicious registry can hijack Bearer token realm to exfiltrate credentials and refresh tokens
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-319",
        "CWE-918"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48978.json"
}
References

Affected packages

Git / github.com/oras-project/oras-go

Affected ranges

Type
GIT
Repo
https://github.com/oras-project/oras-go
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
47b7c804cb38a4af659ec735e473d3854c63a3c0
Fixed
7a9f4b0b9558821b0422152ebe21ae56930fe764
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "2.6.1"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "7a9f4b0b9558821b0422152ebe21ae56930fe764"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "v2.6.1",
            "range":  [
                {
                    "fixed":  "47b7c804cb38a4af659ec735e473d3854c63a3c0"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

v0.*
v0.1.0
v0.2.0
v0.3.0
v0.4.0
v0.5.0
v2.*
v2.0.0
v2.0.0-alpha
v2.0.0-rc.1
v2.0.0-rc.2
v2.0.0-rc.3
v2.0.0-rc.4
v2.0.0-rc.5
v2.0.0-rc.6
v2.0.1
v2.0.2
v2.1.0
v2.2.0
v2.3.0
v2.4.0
v2.5.0
v2.6.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48978.json"