CVE-2026-58391

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

0.27% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 19.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Deferred. NVD last modified this record on 2026-10-20.

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

2026-10-15 15:12Z13 DAYS AGO

Last updated

2026-10-20 02:43Z9 DAYS AGO

Reserved

2026-06-30

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 5.4)

CNA CVSS vector

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

Weaknesses

• CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
• CWE-83Improper Neutralization of Script in Attributes in a Web PageVariant

Data version

5.2

Document digest

07464978968a84e603cf90d6db581010e7a041ba7b83068612a32c5e20f66c85

• github.comhttps://github.com/opnsense/core/security/advisories/GHSA-2xrm-p255-p43hx_refsource_CONFIRM
• github.comhttps://github.com/opnsense/core/commit/5e6313f50546474031805039e209830b63b2b0e4x_refsource_MISC
• github.comhttps://github.com/opnsense/core/commit/fb3b8a07f407ce281b1dde748706acbb0bc514cex_refsource_MISC
• hackerask.comhttps://hackerask.com/posts/opnsensex_refsource_MISC