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Description

Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, secure uploads could be exposed by pull_hotlinked_images when an attacker knew the secured upload URL and the secure_uploads site setting was enabled. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.

PUBLISHED Reserved 2026-05-13 | Published 2026-07-09 | Updated 2026-07-10 | Assigner GitHub_M




MEDIUM: 6.3CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Problem types

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

Product status

>= 2026.1.0-latest, < 2026.1.5
affected

>= 2026.4.0-latest, < 2026.4.2
affected

>= 2026.5.0-latest, < 2026.5.1
affected

References

github.com/...course/security/advisories/GHSA-3876-w96v-8v38

github.com/...ommit/5807c426880eadf248006e851604fc9284327ce5

github.com/...ommit/8b4a959b251a856a9c911fb9f2ac34fbc31a7471

github.com/...ommit/eff53af26367ae0dcb3a426954d233e8c7449f95

github.com/...ommit/fa74e0dec7341a858ab83a1977fa52629bced1aa

github.com/discourse/discourse/releases/tag/v2026.1.5

github.com/discourse/discourse/releases/tag/v2026.4.2

github.com/discourse/discourse/releases/tag/v2026.5.1

github.com/discourse/discourse/releases/tag/v2026.6.0

cve.org (CVE-2026-45788)

nvd.nist.gov (CVE-2026-45788)

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