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CVE-2026-46413

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, regular users could route direct S3 multipart uploads through ExternalUploadManager into the admin backup store. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:1418f3510c0d5842d2dbd6a6805e361ce85c9171c8dd69c500e86f41b254cbb5
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"discourse","vendor":"discourse","versions":[{"status":"affected","version":">= 2026.1.0-latest, < 2026.1.5"},{"status":"affected","version":">= 2026.4.0-latest, < 2026.4.2"},{"status":"affected","version":">= 2026.5.0-latest, < 2026.5.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/problemTypes/0/descriptions/0

Source references

9 source assertions
{"name":"https://github.com/discourse/discourse/commit/1f1ded8dd361d81786bff17b35e1138d6ee299c0","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/1f1ded8dd361d81786bff17b35e1138d6ee299c0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/references/1
{"name":"https://github.com/discourse/discourse/commit/7ddde266617b452152c1bf5f903f6c07be38fc40","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/7ddde266617b452152c1bf5f903f6c07be38fc40"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/references/2
{"name":"https://github.com/discourse/discourse/commit/a53df26dcf7e50ce2b20bfd5454a0c9d44b8fc7d","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/a53df26dcf7e50ce2b20bfd5454a0c9d44b8fc7d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/references/3
{"name":"https://github.com/discourse/discourse/commit/abaa664c5df84026efb2ca264ba0f5586c3f2b01","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/commit/abaa664c5df84026efb2ca264ba0f5586c3f2b01"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/references/4
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.1.5","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/references/5
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.4.2","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/references/6
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.5.1","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/references/7
{"name":"https://github.com/discourse/discourse/releases/tag/v2026.6.0","tags":["x_refsource_MISC"],"url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /containers/cna/references/8
{"name":"https://github.com/discourse/discourse/security/advisories/GHSA-3mvf-q9rg-w6m7","tags":["x_refsource_CONFIRM"],"url":"https://github.com/discourse/discourse/security/advisories/GHSA-3mvf-q9rg-w6m7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:6d54f3cf802019b2497dc25cad38f3b343764e9496508569162dc0c12f80d4ca · sha256:fd4bb3e15d3f68a3… · /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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