{"id":"CVE-2026-55588","title":"ORAS (OCI Registry As Storage) is a CLI and library for managing artifacts in OCI registries","summary":"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 registr…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","cwe":["CWE-400","CWE-674","CWE-835"],"vendor":"oras","product":"oras.land/oras","affected":["oras.land/oras < 1.3.3"],"patched":["oras.land/oras 1.3.3"],"published":"2026-08-25","updated":"2026-09-09","sourceUpdated":"2026-09-09T21:07:31.353","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55588","references":[{"url":"https://github.com/oras-project/oras/commit/440eb65d07a0631f131944d28e7c29d562ec17f3","label":"security-advisories@github.com"},{"url":"https://github.com/oras-project/oras/security/advisories/GHSA-298f-872v-2rcx","label":"security-advisories@github.com"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55588"},{"url":"https://github.com/advisories/GHSA-298f-872v-2rcx"}],"tags":["nvd","ghsa","go","score-dispute"],"epss":0.00302,"epssPercentile":0.23063,"aliases":["GHSA-298f-872v-2rcx"],"ecosystem":"go","scores":{"nvd":6.5,"ghsa":2},"ingestedAt":"2026-08-28T18:23:37.131Z","slug":"CVE-2026-55588","body":"## Overview\n\nORAS (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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-55588)\n\nAffected packages:\n\n- `oras.land/oras < 1.3.3`\n\nPatched in:\n\n- `oras.land/oras 1.3.3`\n\nSource: https://github.com/advisories/GHSA-298f-872v-2rcx","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":201783,"id":"CVE-2026-55588","ts":1789399715279,"field":"cvss","old":"2","new":"6.5"},{"seq":201782,"id":"CVE-2026-55588","ts":1789399715279,"field":"severity","old":"low","new":"medium"},{"seq":200513,"id":"CVE-2026-55588","ts":1789397363841,"field":"cvss","old":"6.5","new":"2"},{"seq":200512,"id":"CVE-2026-55588","ts":1789397363841,"field":"severity","old":"medium","new":"low"},{"seq":198430,"id":"CVE-2026-55588","ts":1789391951371,"field":"cvss","old":"2","new":"6.5"},{"seq":198429,"id":"CVE-2026-55588","ts":1789391951371,"field":"severity","old":"low","new":"medium"},{"seq":196223,"id":"CVE-2026-55588","ts":1789383569606,"field":"cvss","old":"6.5","new":"2"},{"seq":196222,"id":"CVE-2026-55588","ts":1789383569606,"field":"severity","old":"medium","new":"low"},{"seq":195152,"id":"CVE-2026-55588","ts":1789380463480,"field":"cvss","old":"2","new":"6.5"},{"seq":195151,"id":"CVE-2026-55588","ts":1789380463480,"field":"severity","old":"low","new":"medium"},{"seq":193939,"id":"CVE-2026-55588","ts":1789378497661,"field":"cvss","old":"6.5","new":"2"},{"seq":193938,"id":"CVE-2026-55588","ts":1789378497661,"field":"severity","old":"medium","new":"low"},{"seq":192726,"id":"CVE-2026-55588","ts":1789376396214,"field":"cvss","old":"2","new":"6.5"},{"seq":192725,"id":"CVE-2026-55588","ts":1789376396214,"field":"severity","old":"low","new":"medium"},{"seq":191513,"id":"CVE-2026-55588","ts":1789373402747,"field":"cvss","old":"6.5","new":"2"},{"seq":191512,"id":"CVE-2026-55588","ts":1789373402747,"field":"severity","old":"medium","new":"low"},{"seq":190298,"id":"CVE-2026-55588","ts":1789369283460,"field":"cvss","old":"2","new":"6.5"},{"seq":190297,"id":"CVE-2026-55588","ts":1789369283460,"field":"severity","old":"low","new":"medium"},{"seq":189085,"id":"CVE-2026-55588","ts":1789368253788,"field":"cvss","old":"6.5","new":"2"},{"seq":189084,"id":"CVE-2026-55588","ts":1789368253788,"field":"severity","old":"medium","new":"low"},{"seq":187868,"id":"CVE-2026-55588","ts":1789365139872,"field":"cvss","old":"2","new":"6.5"},{"seq":187867,"id":"CVE-2026-55588","ts":1789365139872,"field":"severity","old":"low","new":"medium"},{"seq":186655,"id":"CVE-2026-55588","ts":1789363255097,"field":"cvss","old":"6.5","new":"2"},{"seq":186654,"id":"CVE-2026-55588","ts":1789363255097,"field":"severity","old":"medium","new":"low"},{"seq":185441,"id":"CVE-2026-55588","ts":1789361088341,"field":"cvss","old":"2","new":"6.5"},{"seq":185440,"id":"CVE-2026-55588","ts":1789361088341,"field":"severity","old":"low","new":"medium"},{"seq":184228,"id":"CVE-2026-55588","ts":1789358140047,"field":"cvss","old":"6.5","new":"2"},{"seq":184227,"id":"CVE-2026-55588","ts":1789358140047,"field":"severity","old":"medium","new":"low"},{"seq":182479,"id":"CVE-2026-55588","ts":1789354213254,"field":"cvss","old":"2","new":"6.5"},{"seq":182478,"id":"CVE-2026-55588","ts":1789354213254,"field":"severity","old":"low","new":"medium"},{"seq":181272,"id":"CVE-2026-55588","ts":1789353107672,"field":"cvss","old":"6.5","new":"2"},{"seq":181271,"id":"CVE-2026-55588","ts":1789353107672,"field":"severity","old":"medium","new":"low"},{"seq":180065,"id":"CVE-2026-55588","ts":1789350158274,"field":"cvss","old":"2","new":"6.5"},{"seq":180064,"id":"CVE-2026-55588","ts":1789350158274,"field":"severity","old":"low","new":"medium"},{"seq":178858,"id":"CVE-2026-55588","ts":1789348082273,"field":"cvss","old":"6.5","new":"2"},{"seq":178857,"id":"CVE-2026-55588","ts":1789348082273,"field":"severity","old":"medium","new":"low"},{"seq":177651,"id":"CVE-2026-55588","ts":1789346269498,"field":"cvss","old":"2","new":"6.5"},{"seq":177650,"id":"CVE-2026-55588","ts":1789346269498,"field":"severity","old":"low","new":"medium"},{"seq":176444,"id":"CVE-2026-55588","ts":1789343001110,"field":"cvss","old":"6.5","new":"2"},{"seq":176443,"id":"CVE-2026-55588","ts":1789343001110,"field":"severity","old":"medium","new":"low"},{"seq":174561,"id":"CVE-2026-55588","ts":1789334757393,"field":"cvss","old":"2","new":"6.5"},{"seq":174560,"id":"CVE-2026-55588","ts":1789334757393,"field":"severity","old":"low","new":"medium"},{"seq":173356,"id":"CVE-2026-55588","ts":1789333483373,"field":"cvss","old":"6.5","new":"2"},{"seq":173355,"id":"CVE-2026-55588","ts":1789333483373,"field":"severity","old":"medium","new":"low"},{"seq":172170,"id":"CVE-2026-55588","ts":1789330994687,"field":"cvss","old":"2","new":"6.5"},{"seq":172169,"id":"CVE-2026-55588","ts":1789330994687,"field":"severity","old":"low","new":"medium"},{"seq":170984,"id":"CVE-2026-55588","ts":1789328599380,"field":"cvss","old":"6.5","new":"2"},{"seq":170983,"id":"CVE-2026-55588","ts":1789328599380,"field":"severity","old":"medium","new":"low"},{"seq":169779,"id":"CVE-2026-55588","ts":1789327043960,"field":"cvss","old":"2","new":"6.5"},{"seq":169778,"id":"CVE-2026-55588","ts":17893270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