# CVE-2026-55588: oras: ORAS (OCI Registry As Storage) is a CLI and library for managing artifacts in OCI registries

CVE-2026-55588 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-55588, released August 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-55588
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0054
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 25, 2026

## Description

ORAS (OCI Registry As Storage) is a CLI and library for managing artifacts in OCI registries. In ORAS CLI versions up to and including 1.3.2, the recursive referrer traversal does not track visited descriptors, so a malicious OCI registry that returns a cyclic referrer graph causes unbounded recursion and memory growth. This affects oras discover, whose recursive traversal is enabled by default because the --depth option defaults to 0 (unlimited), as well as the recursive referrer counting used by the oras backup and oras restore workflows. A cyclic graph can be as simple as A referring to B and B referring back to A. A malicious registry can use this to cause a client-side denial of service, exhausting CPU and memory and hanging automation or CI/CD pipelines that run ORAS against untrusted registry metadata. The vulnerability does not extend to code execution, artifact substitution, or integrity bypass. This issue has been fixed in version 1.3.3.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | govulncheck-vulndb opensuse-leap 16.0 | 0.0.20260902T191204-160000.1.1 | [OPENSUSE-SU-2026:21812-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21812-1.md) | Sep 8, 2026 |
| Linux | govulncheck-vulndb sles 16.0 | 0.0.20260902T191204-160000.1.1 | [SUSE-SU-2026:23712-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23712-1.md) | Sep 8, 2026 |
| Linux | oras Debian 14 | 1.3.3-1 | [DEBIAN-CVE-2026-55588](https://patchblox.com/security/data/fix/linux/debian-cve-2026-55588.md) | Aug 27, 2026 |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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