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regclient may leak authentication credentials to external blob stores

CVSS 3.1 6.8 MEDIUMEUVD CVSS 3.1 6.8 CVSS 3.1 · [email protected] · Secondary 6.8 MEDIUMCVSS_V3 Publisher rating MODERATEFixed by github.com/regclient/regclient 0.11.5osv · severity unknownFixed by github.com/regclient/regclient 0.11.5KEV status unknown

cve-program · CVE-2026-49349

Published

regclient is a Docker and OCI Registry Client in Go. Prior to version 0.11.5, credentials for a registry may be inadvertently leaked to external servers. A prerequisite for this attack is a malicious registry server, a malicious blob store, or a registry that does not restrict the external URLs for foreign blobs. Version 0.11.5 fixes the issue.

Read the publisher's advisory

euvd · EUVD-2026-57221

Published

regclient is a Docker and OCI Registry Client in Go. Prior to version 0.11.5, credentials for a registry may be inadvertently leaked to external servers. A prerequisite for this attack is a malicious registry server, a malicious blob store, or a registry that does not restrict the external URLs for foreign blobs. Version 0.11.5 fixes the issue.

Read the publisher's advisory

nvd · CVE-2026-49349

Published

regclient is a Docker and OCI Registry Client in Go. Prior to version 0.11.5, credentials for a registry may be inadvertently leaked to external servers. A prerequisite for this attack is a malicious registry server, a malicious blob store, or a registry that does not restrict the external URLs for foreign blobs. Version 0.11.5 fixes the issue.

Read the publisher's advisory

osv · GHSA-qvqc-4c52-x6qp

Published

Credentials for a registry may be inadvertently leaked to external servers. A prerequisite for this attack is a malicious registry server, a malicious blob store, or a registry that does not restrict the external URLs for foreign blobs. ## Example attack A malicious registry serves an OCI image manifest containing a layer descriptor with a `urls` field pointing to an attacker controlled host: ```json { "mediaType": "application/vnd.oci.image.layer.v1.tar+gzip", "digest": "sha256:...", "size": 1024, "urls": ["https://malicious.example.org/blobs/sha256/..."] } ``` When regclient fetches the image and the primary blob request to the registry fails, it falls back to the URLs in the layer descriptor. If the external server requests authentication, regclient would send the credentials for the original registry server. ## Timeline - 2026-05-25: Advisory submitted - 2026-05-26: Fix released ## Credit Theodoros Lampropoulos, Threat Detection Engineer, Odyssey Cyber Security

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osv · GO-2026-5822

Published

regclient may leak authentication credentials to external blob stores in github.com/regclient/regclient

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-49349

Published

regclient

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "regclient",
                    "product": "regclient",
                    "versions": [
                        {
                            "version": "< 0.11.5",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

euvd · EUVD-2026-57221

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Aug 12, 2026, 2:11:58 PM

dateUpdated: Aug 12, 2026, 2:35:58 PM

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

nvd · CVE-2026-49349

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-522

Original publisher date fields

published: 2026-08-12T15:17:37.507

lastModified: 2026-09-09T20:55:04.493

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GHSA-qvqc-4c52-x6qp

Published

github.com/regclient/regclient

Go

SEMVER · introduced 0 → fixed 0.11.5

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GO-2026-5822

Published

github.com/regclient/regclient

Go

SEMVER · introduced 0 → fixed 0.11.5

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 15 Nov 20:10 UTC · 254 of 275 readable · 250 fully read · documentation 468/469 current