CVE-2026-104476

Backdrop CMS before 1.35.1 Information Disclosure via Configuration Export Archive

MEDIUM
5.9
CVSS Score
Published: October 2, 2026 at 11:28 PM UTC
Updated: October 6, 2026 at 03:25 PM UTC
2 products affected across 2 vendorsBackdropBackdrop CMS

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Backdrop CMS before 1.35.1 contains an information disclosure vulnerability that allows unauthenticated attackers to retrieve configuration export archives left on the server after transfer. Attackers can download compressed archives generated by users with configuration export permission to obtain the full site configuration, including sensitive settings.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.35.1
Affected range stops below 1.35.1, so it looks safe — our inference, not a vendor statement
v < 1.35.1
Vendor states this is fixed in 1.35.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-200

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