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01 Record

CVE-2026-116020

BookStack before 26.09.2 Incorrect Authorization via AttachmentController on Draft Pages

MediumPUBLISHEDCNA: VulnCheck
CNA base score5.3 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
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02 Description

BookStack before 26.09.2 Incorrect Authorization via AttachmentController on Draft Pages

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.18% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 7.5% of scored records. A rank, not a probability.
NVD base score
5.3 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/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
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-26.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-24 11:40Z5 DAYS AGO
Last updated
2026-10-24 11:40Z5 DAYS AGO
Reserved
2026-10-24
Assigning CNA
VulnCheck
Record state
PUBLISHED
Severity
Medium (CVSS 5.3)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
Weaknesses
  • CWE-863Incorrect AuthorizationClass
Data version
5.2
Document digest
f450afce36f7ad9b8731e0571d80a97ac63cf26e819e6a1b638a1ca58bf36535

05 Affected products

VendorProductVersionsPlatforms
BookStackAppBookStack0 to < 26.09.2—

06 References