Vulnerability Details CVE-2026-45788
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.005
EPSS Ranking 37.2%
CVSS Severity
CVSS v3 Score 7.5
References
- https://github.com/discourse/discourse/commit/5807c426880eadf248006e851604fc9284327ce5
- https://github.com/discourse/discourse/commit/8b4a959b251a856a9c911fb9f2ac34fbc31a7471
- https://github.com/discourse/discourse/commit/eff53af26367ae0dcb3a426954d233e8c7449f95
- https://github.com/discourse/discourse/commit/fa74e0dec7341a858ab83a1977fa52629bced1aa
- https://github.com/discourse/discourse/releases/tag/v2026.1.5
- https://github.com/discourse/discourse/releases/tag/v2026.4.2
- https://github.com/discourse/discourse/releases/tag/v2026.5.1
- https://github.com/discourse/discourse/releases/tag/v2026.6.0
- https://github.com/discourse/discourse/security/advisories/GHSA-3876-w96v-8v38
Products affected by CVE-2026-45788
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cpe:2.3:a:discourse:discourse:2026.1.0
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cpe:2.3:a:discourse:discourse:2026.1.1
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cpe:2.3:a:discourse:discourse:2026.1.2
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cpe:2.3:a:discourse:discourse:2026.1.3
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cpe:2.3:a:discourse:discourse:2026.1.4
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cpe:2.3:a:discourse:discourse:2026.4.0
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cpe:2.3:a:discourse:discourse:2026.4.1
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cpe:2.3:a:discourse:discourse:2026.6.0