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01 Record

CVE-2026-66881

Path traversal in imported file_entries name allows arbitrary file write via URL-type entry download

HighPUBLISHEDCNA: EEF
CNA base score7.0 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
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02 Description

Path traversal in imported file_entries name allows arbitrary file write via URL-type entry download

03 Exploitation and scoring

Exploitation
Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
SSVC decision
  • ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.60% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 48.9% of scored records. A rank, not a probability.
NVD base score
7.0 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/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
Analyzed. NVD last modified this record on 2026-10-24.
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
2026-08-05 19:43Z2 MO AGO
Last updated
2026-08-06 13:03Z2 MO AGO
Reserved
2026-07-28
Assigning CNA
EEF
Record state
PUBLISHED
Severity
High (CVSS 7.0)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
Weaknesses
  • CWE-23Relative Path TraversalBase
Data version
5.2
Document digest
37e8731c8e8fe555f0423b37183e46c5b64902ab16d5a9773f2b60532785eeb0

05 Affected products

VendorProductVersionsPlatforms
livebook-devlivebook0.11.0 to < 0.18.7, 0.19.0 to < 0.19.9, 0.11.0-cuda12 to < 0.18.7-cuda12, 0.19.0-cuda12 to < 0.19.9-cuda12, c02eb984f80a543c7a52b1d882c76f56aa5be743 to < *—

06 References