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CVE-2026-22043

RustFS is a distributed object storage system built in Rust. In versions 1.0.0-alpha.13 through 1.0.0-alpha.78, a flawed `deny_only` short-circuit in RustFS IAM allows a restricted service account or STS credential to self-issue an unrestricted service account, inheriting the parent’s full privileges. This enables privilege escalation and bypass of session/inline policy restrictions. Version 1.0.0-alpha.79 fixes the issue.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bf59ddd2957177cf171fa5e926054efba90d5e1df0d180b52cf4e705e8ed65ab
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-269","description":"CWE-269: Improper Privilege Management","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5b8448677664b4f42549fe513dd060a3cc6ce4fe62225f8feb3b83e7f3388548 · sha256:40cc538a6a6aa0e0… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5b8448677664b4f42549fe513dd060a3cc6ce4fe62225f8feb3b83e7f3388548 · sha256:40cc538a6a6aa0e0… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"rustfs","vendor":"rustfs","versions":[{"status":"affected","version":">= 1.0.0-alpha.13, < 1.0.0-alpha.79"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:5b8448677664b4f42549fe513dd060a3cc6ce4fe62225f8feb3b83e7f3388548 · sha256:40cc538a6a6aa0e0… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.7,"baseSeverity":"MEDIUM","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:5b8448677664b4f42549fe513dd060a3cc6ce4fe62225f8feb3b83e7f3388548 · sha256:40cc538a6a6aa0e0… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-269","description":"CWE-269: Improper Privilege Management","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5b8448677664b4f42549fe513dd060a3cc6ce4fe62225f8feb3b83e7f3388548 · sha256:40cc538a6a6aa0e0… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-284","description":"CWE-284: Improper Access Control","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:5b8448677664b4f42549fe513dd060a3cc6ce4fe62225f8feb3b83e7f3388548 · sha256:40cc538a6a6aa0e0… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"tags":["exploit"],"url":"https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5b8448677664b4f42549fe513dd060a3cc6ce4fe62225f8feb3b83e7f3388548 · sha256:40cc538a6a6aa0e0… · /containers/adp/0/references/0
{"name":"https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9","tags":["x_refsource_CONFIRM"],"url":"https://github.com/rustfs/rustfs/security/advisories/GHSA-xgr5-qc6w-vcg9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:5b8448677664b4f42549fe513dd060a3cc6ce4fe62225f8feb3b83e7f3388548 · sha256:40cc538a6a6aa0e0… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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