{"cve":"CVE-2026-55588","nvd":{"published":"2026-08-25T21:17:02.350","modified":"2026-09-09T21:07:31.353","status":"Deferred","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-400","CWE-674","CWE-835"],"references":["https://github.com/oras-project/oras/commit/440eb65d07a0631f131944d28e7c29d562ec17f3","https://github.com/oras-project/oras/security/advisories/GHSA-298f-872v-2rcx"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:17.453294893+00:00"},"epss":{"cve":"CVE-2026-55588","score":0.00538,"percentile":0.45311,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-298f-872v-2rcx","url":"https://osv.dev/vulnerability/GHSA-298f-872v-2rcx","summary":"ORAS CLI: Cyclic Referrer Graph Can Cause Unbounded Recursion and Resource Consumption","modified":"2026-09-02T19:41:41.252454697Z","packages":[{"ecosystem":"Go","name":"oras.land/oras","purl":"pkg:golang/oras.land/oras","ranges":["<1.3.3"],"fixed":["1.3.3"]}]},{"id":"GO-2026-6317","url":"https://osv.dev/vulnerability/GO-2026-6317","summary":"ORAS CLI: Cyclic Referrer Graph Can Cause Unbounded Recursion and Resource Consumption in oras.land/oras","modified":"2026-09-02T19:30:09.199411498Z","packages":[{"ecosystem":"Go","name":"oras.land/oras","purl":"pkg:golang/oras.land/oras","ranges":["<1.3.3"],"fixed":["1.3.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}