CVE-2026-83557

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

5.6 (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:L/I:L/A:L

NVD analysis status

Received. NVD last modified this record on 2026-09-01.

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

2026-09-01 14:57Z1 HR AGO

Last updated

2026-09-01 14:57Z1 HR AGO

Reserved

2026-08-31

Assigning CNA

HeroDevs

Record state

PUBLISHED

Severity

Medium (CVSS 5.6)

CNA CVSS vector

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

Weaknesses

• CWE-502Deserialization of Untrusted DataBase
• CWE-915Improperly Controlled Modification of Dynamically-Determined Object AttributesBase

Data version

5.2

Document digest

7e77c2a6297ae193bbd5ee143a618e705f628e849767435e6d13aea3c40c392d

• github.comGHSA-gx83-3vf8-gh7jhttps://github.com/FasterXML/jackson-databind/security/advisories/GHSA-gx83-3vf8-gh7jthird-party-advisory
• github.comFasterXML/jackson-databind#6155https://github.com/FasterXML/jackson-databind/pull/6155patchissue-tracking
• github.comFasterXML/jackson-databind#6156https://github.com/FasterXML/jackson-databind/issues/6156issue-tracking
• github.comFix commit (2.x line, forward-merged to 2.21, 2.22 and the 3.x branches)https://github.com/FasterXML/jackson-databind/commit/eb3b7fc0f9c0d27f471550ac3316b17d1987388fpatch