CVE-2026-55859

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

Not scored by EPSS

EPSS percentile

Not scored by EPSS

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:N/I:H/A:N

NVD analysis status

Received. NVD last modified this record on 2026-08-28.

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

2026-08-28 22:48Z5 HR AGO

Last updated

2026-08-28 22:48Z5 HR AGO

Reserved

2026-06-17

Assigning CNA

GitHub_M

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:N/I:H/A:N

Weaknesses

• CWE-116Improper Encoding or Escaping of OutputClass
• CWE-838Inappropriate Encoding for Output ContextBase

Data version

5.2

Document digest

787d7c6ded782deb8d58f73fa4e9a4dc24cdcb8ea3e3d8f5c60f90a179f187cf

• github.comhttps://github.com/mariadb-corporation/mariadb-connector-r2dbc/security/advisories/GHSA-5rqc-86vf-g8r2x_refsource_CONFIRM
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-r2dbc/commit/38bad9afebc6c581a853656a42f9ebf403b1b1b7x_refsource_MISC
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-r2dbc/releases/tag/1.4.1x_refsource_MISC
• jira.mariadb.orghttps://jira.mariadb.org/browse/R2DBC-124x_refsource_MISC