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CVE-2026-55588— ORAS CLI: Cyclic Referrer Graph Can Cause Unbounded Recursion and Resource Consumption

Quick assessment

Affected
oras-project oras
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OCI Registry As Storage ORAS是OCI Registry As Storage组织的一款OCI制品注册表存储工具。 OCI Registry As Storage ORAS 1.3.2及之前版本存在资源管理错误漏洞，该漏洞源于递归引用遍历未跟踪已访问描述符，恶意OCI注册表返回循环引用图可能导致无界递归和内存增长，造成客户端拒绝服务，耗尽CPU和内存并使自动化或CI/CD管道挂起。

CVSS 6.5 · Medium EPSS 0.54% · P45

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 1

VendorProduct Version RangeStatus
oras-project oras < 1.3.3 affected
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I. Basic Information for CVE-2026-55588

Vulnerability Information
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Vulnerability Title
ORAS CLI: Cyclic Referrer Graph Can Cause Unbounded Recursion and Resource Consumption
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
OCI Registry As Storage ORAS 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OCI Registry As Storage ORAS是OCI Registry As Storage组织的一款OCI制品注册表存储工具。 OCI Registry As Storage ORAS 1.3.2及之前版本存在资源管理错误漏洞，该漏洞源于递归引用遍历未跟踪已访问描述符，恶意OCI注册表返回循环引用图可能导致无界递归和内存增长，造成客户端拒绝服务，耗尽CPU和内存并使自动化或CI/CD管道挂起。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
oras-project oras < 1.3.3 -

II. Public POCs for CVE-2026-55588

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III. Intelligence Information for CVE-2026-55588

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Patches & Fixes for CVE-2026-55588 (1)

Vendor Advisories for CVE-2026-55588 (1)

IV. Related Vulnerabilities

Same product: oras
Same vendor: oras-project
Same weakness: CWE-400

V. Comments for CVE-2026-55588

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