CVE-2026-86471

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total 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 48.7% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:A/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:N/AU:Y/R:U/V:C/RE:M/U:Red

NVD analysis status

Deferred. NVD last modified this record on 2026-10-21.

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

2026-10-20 15:38Z8 DAYS AGO

Last updated

2026-10-21 03:56Z8 DAYS AGO

Reserved

2026-09-07

Assigning CNA

apache

Record state

PUBLISHED

Severity

Critical (CVSS 9.3)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L/E:A/S:N/AU:Y/R:U/V:C/RE:M/U:Red

Weaknesses

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

Data version

5.2

Document digest

2f932f97a0117464e92e99b11ffee1cd6f56d00318d5fa3ae4176b961dee13b3

• lists.apache.orghttps://lists.apache.org/thread.html/pj83174r8f8f64odf47fwhozbfjtot0frelease-notes
• lists.apache.orghttps://lists.apache.org/thread/c8p73gswgogtnzvk7hpw8jb8d4mnosdpvendor-advisory
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/10/20/11