CVE-2026-45788

Discourse: Secure uploads exposed by hotlinked image copying

6.3 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

0.63%Up 0.2 points since Jul 10, 2026

What each source reports

CVE List Score used 6.3

Discourse: Secure uploads exposed by hotlinked image copying

Record: CVE-2026-45788
CVSS 4.0: 6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness: CWE-200
Updated: 2026-11-02

EUVDEUVD-2026-42731 6.3

Record: EUVD-2026-42731
CVSS 4.0: 6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Updated: 2026-11-02

NVD 6.3

Record: CVE-2026-45788
CVSS 4.0: 6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-200
Updated: 2026-11-02

OSV 6.3

Discourse: Secure uploads exposed by hotlinked image copying

Record: CVE-2026-45788
CVSS 4.0: 6.3 MediumCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness: CWE-200
Updated: 2026-11-02

OSVBIT-discourse-2026-45788 No score

Discourse: Secure uploads exposed by hotlinked image copying

Record: BIT-discourse-2026-45788
Updated: 2026-11-02

Affected products

discourse

Affected packages

Affected packages
Package	Affected	Fixed
`discourse` Bitnami	2026.1.0 up to 2026.1.5, 2026.4.0 up to 2026.4.2, 2026.5.0 up to 2026.5.1	2026.1.52026.4.22026.5.1

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-45788 is a medium vulnerability (CVSS 6.3) in Discourse, published July 9, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.63%, the 50th percentile. Fixed in discourse 2026.1.5.

References

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