CVE Intelligence
Critical Insecure deserialization

CVE-2020-9547 — jackson-databind mishandles the interaction between serialization gadgets and typing

FasterXML jackson-databind 2.x before 2.9.10.4 mishandles the interaction between serialization gadgets and typing, related to com.ibatis.sqlmap.engine.transaction.jta.JtaTransactionConfig (aka ibatis-sqlmap).

Published Mar 2, 2020 · Updated Oct 13, 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.

Detection templates (Nuclei) · 1
How the score was calculated
  • Public exploit/PoC (nuclei)+4
  • EPSS 18.4% (30-day exploitation probability)+15
  • Technical severity (critical)+10
  • Automatable exploitation (SSVC)+3

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
18.38%
ahead of 97% of scored CVEs · Oct 14, 2026
Affects
Debian
Debian Linux and 16 more
CVSS base
9.8
Critical · 4 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
Yes
can an attacker script the kill-chain steps
Technical impact
Total
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 — 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 2.9.10.4 — github.com (GitHub Security Advisories)
  • Maven Com.fasterxml.jackson.core:jackson-databind: fixed in version 2.8.11.6 — github.com (GitHub Security Advisories)
  • Maven Com.fasterxml.jackson.core:jackson-databind: fixed in version 2.7.9.7 — 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, Netapp Active Iq Unified Manager…).
  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. EPSS ahead of 97% of scored CVEs: prioritize it in the patch queue.
  5. 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 8.0 Vulnerable NIST National Vulnerability Database
Fasterxml Jackson-databind ≥ 2.9.0 and < 2.9.10.4≥ 2.8.0 and < 2.8.11.6≥ 2.0.0 and < 2.7.9.7 Vulnerable NIST National Vulnerability Database
Netapp Active Iq Unified Manager ≥ 7.3≥ 9.5 Vulnerable NIST National Vulnerability Database
Oracle Autovue For Agile Product Lifecycle Management version 21.0.2 Vulnerable NIST National Vulnerability Database
Oracle Banking Platform ≥ 2.4.0 and ≤ 2.9.0 Vulnerable NIST National Vulnerability Database
Oracle Communications Contacts Server version 8.0.0.4.0 Vulnerable NIST National Vulnerability Database
Oracle Communications Evolved Communications Application Server version 7.1 Vulnerable NIST National Vulnerability Database
Oracle Communications Instant Messaging Server version 10.0.1.4.0 Vulnerable NIST National Vulnerability Database
Oracle Communications Network Charging And Control version 6.0.1≥ 12.0.0 and ≤ 12.0.3 Vulnerable NIST National Vulnerability Database
Oracle Enterprise Manager Base Platform version 13.3.0.0version 13.4.0.0 Vulnerable NIST National Vulnerability Database
Oracle Global Lifecycle Management Opatch < 12.2.0.1.20 Vulnerable NIST National Vulnerability Database
Oracle Jd Edwards Enterpriseone Orchestrator < 9.2.4.2 Vulnerable NIST National Vulnerability Database
Oracle Jd Edwards Enterpriseone Tools < 9.2.4.2 Vulnerable NIST National Vulnerability Database
Oracle Primavera Unifier ≥ 17.7 and ≤ 17.12version 16.1version 16.2version 18.8version 19.12 Vulnerable NIST National Vulnerability Database
Oracle Retail Xstore Point Of Service version 19.0version 18.0version 17.0version 16.0version 15.0 Vulnerable NIST National Vulnerability Database
Oracle Weblogic Server version 12.2.1.3.0version 12.2.1.4.0 Vulnerable NIST National Vulnerability Database
Maven Com.fasterxml.jackson.core:jackson-databind ≥ 2.9.0 and < 2.9.10.4≥ 2.8.0 and < 2.8.11.6≥ 2.0.0 and < 2.7.9.7 Vulnerable GitHub Security Advisories

Attack characteristics

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

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
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
9.8 CVSS 3.1 Critical 3.9 5.9 nvd@nist.gov via NIST National Vulnerability Database
9.8 CVSS 3.1 Critical 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0 via NIST National Vulnerability Database
9.8 CVSS 3.1 Critical — — GitHub, Inc. via GitHub Security Advisories
9.8 CVSS 3.1 Critical — — CISA-ADP via CVE Program (cve.org) e CISA ADP
6.8 CVSS 2.0 Medium 8.6 6.4 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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 →

Public exploits, PoCs and detection templates

Public code that demonstrates or tests the flaw raises the odds of mass exploitation — and Nuclei templates help find vulnerable assets in your environment.

Detection templates (Nuclei)

Warning: public PoCs are sometimes disguised malware. Use them only for authorized testing in an isolated environment. This portal does not host exploit code — it only points to the sources.

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 18.38%

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 13, 2026 · GitHub Security Advisories
  • Affected products added · maven/com.fasterxml.jackson.core:jackson-databind
    Oct 13, 2026 · GitHub Security Advisories
  • SSVC assessment updated
    Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
  • Record published
    Oct 13, 2026
  • Fix documented
    Oct 13, 2026 · NIST National Vulnerability Database
  • CVSS changed · 9.8
    Oct 13, 2026 · NIST National Vulnerability Database
  • Source status changed · → Modified
    Oct 13, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 13, 2026 · NIST National Vulnerability Database
  • 2020
  • CVE published
    Mar 2, 2020 · mitre

Source activity

Repeated readings are counted rather than listed.

  • 1× References added · Oct 13, 2026 – Oct 13, 2026
  • 1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

42 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-2026-83038 Vulnerability in the Oracle WebLogic Server product of Oracle Fusion Middleware (component:... Sep 15, 2026
  • CVE-2026-83021 Improper Authentication in Oracle Weblogic Server Sep 15, 2026
  • CVE-2026-70756 Improper Authentication in Oracle Weblogic Server Sep 15, 2026
  • CVE-2026-70757 Improper Authentication in Oracle Weblogic Server Sep 15, 2026
  • CVE-2026-70748 Improper Authentication in Oracle Weblogic Server Sep 15, 2026
  • CVE-2026-70684 Improper Access Control in Oracle Enterprise Manager Base Platform Aug 18, 2026

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-2020-9547 is "jackson-databind mishandles the interaction between serialization gadgets and typing", rated Critical. It affects Debian Linux (Debian); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 9.8 describes technical severity. EPSS 18.38% 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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