CVE-2026-66297

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

1.88% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 77.8% of scored records. A rank, not a probability.

NVD base score

4.9 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/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 2026-08-10.

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.

Published

2026-08-05 19:43Z1 MO AGO

Last updated

2026-08-06 13:04Z29 DAYS AGO

Reserved

2026-07-24

Assigning CNA

EEF

Record state

PUBLISHED

Severity

Medium (CVSS 5.0)

CNA CVSS vector

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

Weaknesses

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')Base

Data version

5.2

Document digest

e176ac64e8c89fa37918a13156f6bec1528ac4c889290bddee540fd88260593e

• github.comhttps://github.com/livebook-dev/livebook/security/advisories/GHSA-qpjc-w5mm-73mjvendor-advisoryrelated
• cna.erlef.orghttps://cna.erlef.org/cves/CVE-2026-66297.htmlrelated
• osv.devhttps://osv.dev/vulnerability/EEF-CVE-2026-66297related
• github.comhttps://github.com/livebook-dev/livebook/commit/b2a8416d149043132fe5a14ed611e0fefc9dc9cdpatch
• github.comhttps://github.com/livebook-dev/livebook/commit/0c2487326bbb37cb1eb43bb2f76eb93ad9f8fd6bpatch
• github.comhttps://github.com/livebook-dev/livebook/commit/f8fe9c62cb8bfc1dd0ccda4ea4a57c5e91563c85patch