CVE-2026-55858

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

0.87% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 58.4% 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:N/I:H/A:N

NVD analysis status

Awaiting Analysis. NVD last modified this record on 2026-09-08.

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

2026-08-28 22:46Z2 MO AGO

Last updated

2026-09-01 02:06Z1 MO 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-838Inappropriate Encoding for Output ContextBase

Data version

5.2

Document digest

438667d2c4e8a98a004f256a966b191579fcc1e060ba559fc1979dd28449a927

• github.comhttps://github.com/mariadb-corporation/mariadb-connector-j/security/advisories/GHSA-xvr9-35cr-46v9x_refsource_CONFIRM
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-j/commit/300716bef1e1d0370a41be7863b88aa2d55fbb69x_refsource_MISC
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-j/commit/7b3c69221b5463ee03472654040b3f6b9e5329c7x_refsource_MISC
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-j/commit/8cfd9df697372ad4ed09fe87a34b34babb6d43d6x_refsource_MISC
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-j/commit/c555c9b477521be0c35c3a5461f9f46681553607x_refsource_MISC
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/2.7.14x_refsource_MISC
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.3.5x_refsource_MISC
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.4.3x_refsource_MISC
• github.comhttps://github.com/mariadb-corporation/mariadb-connector-j/releases/tag/3.5.9x_refsource_MISC
• jira.mariadb.orghttps://jira.mariadb.org/browse/CONJ-1317x_refsource_MISC