CVE Intelligence
High Insecure deserialization

CVE-2018-12023 — Deserialization of Untrusted Data

An issue was discovered in FasterXML jackson-databind prior to 2.7.9.4, 2.8.11.2, and 2.9.6. When Default Typing is enabled (either globally or for a specific property), the service has the Oracle JDBC jar in the classpath, and an attacker can provide an LDAP service to access, it is possible to make the service execute a malicious payload.

Published Mar 21, 2019 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: mitre

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 8.9% (30-day exploitation probability)+14
  • Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
8.94%
ahead of 95% of scored CVEs · Oct 15, 2026
Affects
Debian
Debian Linux and 11 more
CVSS base
7.5
High · 2 source(s)

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation
None
none · proof-of-concept · active
Automatable
No
can an attacker script the kill-chain steps
Technical impact
Partial
partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

  • Documented patch — github.com (NIST National Vulnerability Database)
  • Documented patch — github.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Documented patch — www.oracle.com (NIST National Vulnerability Database)
  • Maven Com.fasterxml.jackson.core:jackson-databind: fixed in version 2.7.9.4 — github.com (GitHub Security Advisories)
  • Maven Com.fasterxml.jackson.core:jackson-databind: fixed in version 2.8.11.2 — github.com (GitHub Security Advisories)
  • Maven Com.fasterxml.jackson.core:jackson-databind: fixed in version 2.9.6 — github.com (GitHub Security Advisories)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Debian Debian Linux, Fasterxml Jackson-databind, Fedoraproject Fedora…).
  2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
  3. Apply the fixed version or the patch documented under Remediation.
  4. Exploitation requires user interaction: tighten email/web filtering and warn affected users.
  5. EPSS ahead of 95% of scored CVEs: prioritize it in the patch queue.
  6. Search available logs for exploit probes matching the vulnerability class (insecure deserialization), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Debian Debian Linux version 9.0 Vulnerable NIST National Vulnerability Database
Fasterxml Jackson-databind ≥ 2.7.0 and < 2.7.9.4≥ 2.8.0 and < 2.8.11.2≥ 2.9.0 and < 2.9.6 Vulnerable NIST National Vulnerability Database
Fedoraproject Fedora version 29 Vulnerable NIST National Vulnerability Database
Oracle Jd Edwards Enterpriseone Tools version 9.2 Vulnerable NIST National Vulnerability Database
Oracle Retail Merchandising System version 15.0 Vulnerable NIST National Vulnerability Database
Red Hat Automation Manager version 7.3.1 Vulnerable NIST National Vulnerability Database
Red Hat Decision Manager version 7.3.1 Vulnerable NIST National Vulnerability Database
Red Hat Jboss Brms version 6.4.10 Vulnerable NIST National Vulnerability Database
Red Hat Jboss Enterprise Application Platform version 7.2.0 Vulnerable NIST National Vulnerability Database
Red Hat Openshift Container Platform version 3.11 Vulnerable NIST National Vulnerability Database
Red Hat Single Sign-on version 7.3 Vulnerable NIST National Vulnerability Database
Maven Com.fasterxml.jackson.core:jackson-databind ≥ 2.7.0 and ≤ 2.7.9.3≥ 2.8.0 and ≤ 2.8.11.1≥ 2.9.0 and < 2.9.6 Vulnerable GitHub Security Advisories

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
7.5 CVSS 3.0 High 1.6 5.9 nvd@nist.gov via NIST National Vulnerability Database
7.5 CVSS 3.0 High — — GitHub, Inc. via GitHub Security Advisories
5.1 CVSS 2.0 Medium 4.9 6.4 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H (score shown at the top: nvd@nist.gov)

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-502 · Deserialization of Untrusted Data

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
  • Monitor serialized objects in requests and unexpected processes spawned by the runtime.
web/proxy/WAF logsnetwork IDS/IPSendpoint telemetry (EDR)application logs

Timeline

What happened to this CVE, newest first.

  • 2026
  • Fix documented
    Oct 15, 2026 · GitHub Security Advisories
  • Affected products added · maven/com.fasterxml.jackson.core:jackson-databind
    Oct 15, 2026 · GitHub Security Advisories
  • SSVC assessment updated
    Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 15, 2026
  • Fix documented
    Oct 15, 2026 · NIST National Vulnerability Database
  • Affected products added · fasterxml/jackson-databind, debian/debian linux, fedoraproject/fedora, oracle/jd edwards enterpriseone tools, oracle/ret
    Oct 15, 2026 · NIST National Vulnerability Database
  • CVSS changed · 7.5
    Oct 15, 2026 · NIST National Vulnerability Database
  • Source status changed · → Modified
    Oct 15, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 15, 2026 · Alertas do Telegram
  • 2019
  • CVE published
    Mar 21, 2019 · mitre

Source activity

Repeated readings are counted rather than listed.

  • 2× References added · Oct 15, 2026 – Oct 15, 2026
  • 1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

47 on the record

Elsewhere on this site

Debian
every CVE for this vendor
Insecure deserialization
same class
CWE-502
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-104045 Sssd: sssd: denial of service via race condition in autofs responder 10d
  • CVE-2026-104046 Sssd: sssd: denial of service via incomplete identity provider authentication requests 10d
  • CVE-2026-104047 Sssd: sssd: information disclosure via query injection in entra id lookups 10d
  • CVE-2026-104048 Sssd: sssd: authorization bypass via cross-domain username collision in hbac evaluation 10d
  • CVE-2026-104040 Sssd: sssd: information disclosure via odata injection in entra id lookups 10d
  • CVE-2026-91776 jackson-databind: unbounded growth of the type id cache in TypeDeserializerBase retains every unknown raw type ID 23d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2018-12023 is "Deserialization of Untrusted Data", rated High. It affects Debian Linux (Debian); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.5 describes technical severity. EPSS 8.94% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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