CVE-2026-66053

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

0.29% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 21.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-10-24.

Red Hat severity

Moderate. 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

2026-07-27 11:18Z3 MO AGO

Last updated

2026-07-27 13:08Z3 MO AGO

Reserved

2026-07-23

Assigning CNA

apache

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

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

Weaknesses

• CWE-297Improper Validation of Certificate with Host MismatchVariant
• CWE-295Improper Certificate ValidationBase

Data version

5.2

Document digest

fd9e004791006acde8eee387db8ee1da49b24d023ad1451bc60233ca60dff585

• lists.apache.orghttps://lists.apache.org/thread/7v3jhgwfbmhx42424phydlnzb109g8b9vendor-advisory
• lists.apache.orghttps://lists.apache.org/thread/w4k5dnv1x58knwlhpo9x0or5xh220y65vendor-advisory