CVE-2026-66422

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 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

0.43% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 37.1% of scored records. A rank, not a probability.

NVD base score

8.1 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-08-27.

Red Hat severity

Low. Red Hat's rating for its own products, not a CVSS rating.

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

2026-08-25 21:55Z2 MO AGO

Last updated

2026-08-26 18:52Z2 MO AGO

Reserved

2026-07-27

Assigning CNA

apache

Record state

PUBLISHED

Severity

High (CVSS 8.1)

CNA CVSS vector

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

Weaknesses

• CWE-285Improper AuthorizationClass
• CWE-386Symbolic Name not Mapping to Correct ObjectBase

Data version

5.2

Document digest

a09f059083373722bd751123b3ca3b476c522cd05f65d217bd1d5abc33d1d73f

• lists.apache.orghttps://lists.apache.org/thread/j5plylz1b2vhqvbkqn7k58nygxhcpk73vendor-advisory
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/08/26/6