Widely-used Jackson databind library; high-severity deserialization flaw enabling RCE; affects many Java apps.
CVE-2026-54512
Deserialization bypass in Jackson Databind enables RCE via attacker-controlled type.
Is CVE-2026-54512 being exploited?
Not confirmed. CVE-2026-54512 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.87% probability of exploitation in the next 30 days.
How severe is CVE-2026-54512?
CVE-2026-54512 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-54512?
Yes. A fix has been recorded for CVE-2026-54512. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-54512 affect?
CVE-2026-54512 affects jackson-databind (2.10.0–2.18.8, 2.21.4, 3.1.4). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-54512?
Upgrade to latest non-vulnerable Jackson Databind (2.18.8+, 2.21.4, or 3.1.4+)
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE via deserialization of attacker-controlled JSON; bypasses PTV allow-list to load a malicious class.
Patch when possible
- affected>= 2.10.0 and < 2.18.8
- affected>= 2.19.0 and < 2.21.4
- affected>= 3.0.0 and < 3.1.4
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.