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CVE-2026-33540

Distribution is a toolkit to pack, ship, store, and deliver container content. Prior to 3.1.0, in pull-through cache mode, distribution discovers token auth endpoints by parsing WWW-Authenticate challenges returned by the configured upstream registry. The realm URL from a bearer challenge is used without validating that it matches the upstream registry host. As a result, an attacker-controlled upstream (or an attacker with MitM position to the upstream) can cause distribution to send the configu
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:86824cf3554c12d28998414b3cfbf5446d07fde95be88da1a18c86b24d0e0cc6
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"distribution","vendor":"distribution","versions":[{"status":"affected","version":"< 3.1.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e71ae00090d5c5f8f101931d92e1386312c3c3c9f2e7581a07f01545267cd992 · sha256:06a5756a0771798a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e71ae00090d5c5f8f101931d92e1386312c3c3c9f2e7581a07f01545267cd992 · sha256:06a5756a0771798a… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-918","description":"CWE-918: Server-Side Request Forgery (SSRF)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e71ae00090d5c5f8f101931d92e1386312c3c3c9f2e7581a07f01545267cd992 · sha256:06a5756a0771798a… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/distribution/distribution/security/advisories/GHSA-3p65-76g6-3w7r","tags":["x_refsource_CONFIRM"],"url":"https://github.com/distribution/distribution/security/advisories/GHSA-3p65-76g6-3w7r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e71ae00090d5c5f8f101931d92e1386312c3c3c9f2e7581a07f01545267cd992 · sha256:06a5756a0771798a… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/distribution/distribution/security/advisories/GHSA-3p65-76g6-3w7r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e71ae00090d5c5f8f101931d92e1386312c3c3c9f2e7581a07f01545267cd992 · sha256:06a5756a0771798a… · /containers/adp/0/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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