grimmory-tools grimmory Download Endpoint KoboController.java streamFileToResponse authorization

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-93955
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-19 23:17:09 UTC
Updated2026-09-19 23:17:09 UTC
DescriptionA vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToResponse of the file backend/src/main/java/org/booklore/controller/KoboController.java of the component Download Endpoint. Performing a manipulation of the argument bookId results in authorization bypass. The attack may be initiated remotely. The exploit is now public and may be used. Issue #2431 is closed as completed, but its only comment states that the issue “has already been reported elsewhere.” No fixing commit or pull request is identified there.

Risk And Classification

Primary CVSS: v4.0 2.1 LOW from [email protected]

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

Problem Types: CWE-285 | CWE-639 | CWE-639 Authorization Bypass | CWE-285 Improper Authorization

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary2.1LOWCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/C...
4.0CNADECLARED5.3MEDIUMCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
3.1[email protected]Primary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
3.0CNADECLARED4.3MEDIUMCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
2.0[email protected]Secondary4AV:N/AC:L/Au:S/C:P/I:N/A:N
2.0CNADECLARED4AV:N/AC:L/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:C

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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 v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Grimmory-tools Grimmory affected 3.3.0 Not specified
CNA Grimmory-tools Grimmory affected 3.3.1 Not specified
CNA Grimmory-tools Grimmory affected 3.3.2 Not specified
CNA Grimmory-tools Grimmory affected 3.3.3 Not specified
CNA Grimmory-tools Grimmory affected 3.4.0 Not specified
CNA Grimmory-tools Grimmory affected 3.4.1 Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/407914/cti [email protected] vuldb.com
github.com/grimmory-tools/grimmory/issues/2431 [email protected] github.com
github.com/grimmory-tools/grimmory [email protected] github.com
github.com/grimmory-tools/grimmory/issues/2431 [email protected] github.com
vuldb.com/submit/943921 [email protected] vuldb.com
vuldb.com/vuln/407914 [email protected] vuldb.com
vuldb.com/cve/CVE-2026-93955 [email protected] vuldb.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: summmm (VulDB User) (en)

CNA: VulDB CNA Team (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-09-19T00:00:00.000ZAdvisory disclosed
CNA2026-09-19T02:00:00.000ZVulDB entry created
CNA2026-09-19T10:56:27.000ZVulDB entry last update

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