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NVD / CVE Program· CNA GitHub_M

CVE-2026-54513: jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray)

Noroxi assessment

Priority: Monitor (action score 32/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 68.6% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: FasterXML jackson-databind 2.18.8.

Low priority for now. Upgrade to FasterXML jackson-databind 2.18.8 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.10.0 until 2.18.8, 2.21.4, and 3.1.4, BasicPolymorphicTypeValidator.Builder.allowIfSubTypeIsArray() allowlists any array type based only on clazz.isArray(), without validating the array's component (element) type against the configured allowlist. A PTV built with allowIfSubTypeIsArray() plus an explicit concrete-type allowlist therefore still permits EvilType[] even though EvilType is not allowlisted. When Jackson deserializes the elements and no per-element type IDs are present, it instantiates the component type directly with no further PTV check, bypassing the allowlist. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.

HighCVSS 8.1 · v3.1—No exploit Fix available
Published
Jun 23, 2026
Updated
Oct 25, 2026
EPSS
1.2% · 68th percentile

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
32 / 40 · 8.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
8.1
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
fasterxmljackson-databind

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fasterxml jackson-databind2.10.0 and later · before 2.18.8
  • fasterxml jackson-databind2.19.0 and later · before 2.21.4
  • fasterxml jackson-databind3.0.0 and later · before 3.1.4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • FasterXML jackson-databind

    • >= 2.10.0, < 2.18.8, >= 2.19.0, < 2.21.4, >= 3.0.0, < 3.1.4affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:10idm-pki-acmebefore 11.9.0-4.el10_2.alma.111.9.0-4.el10_2.alma.1
AlmaLinux:10idm-pki-basebefore 11.9.0-4.el10_2.alma.111.9.0-4.el10_2.alma.1
AlmaLinux:10idm-pki-cabefore 11.9.0-4.el10_2.alma.111.9.0-4.el10_2.alma.1
AlmaLinux:10idm-pki-javabefore 11.9.0-4.el10_2.alma.111.9.0-4.el10_2.alma.1
AlmaLinux:10idm-pki-krabefore 11.9.0-4.el10_2.alma.111.9.0-4.el10_2.alma.1
AlmaLinux:10idm-pki-serverbefore 11.9.0-4.el10_2.alma.111.9.0-4.el10_2.alma.1
AlmaLinux:10idm-pki-toolsbefore 11.9.0-4.el10_2.alma.111.9.0-4.el10_2.alma.1
AlmaLinux:10python3-idm-pkibefore 11.9.0-4.el10_2.alma.111.9.0-4.el10_2.alma.1
AlmaLinux:8apache-commons-collectionsbefore 3.2.2-10.module_el8.5.0+2577+9e95fe003.2.2-10.module_el8.5.0+2577+9e95fe00
AlmaLinux:8apache-commons-langbefore 2.6-21.module_el8.5.0+2577+9e95fe002.6-21.module_el8.5.0+2577+9e95fe00
AlmaLinux:8apache-commons-netbefore 3.6-3.module_el8.5.0+2577+9e95fe003.6-3.module_el8.5.0+2577+9e95fe00
AlmaLinux:8bea-stax-apibefore 1.2.0-16.module_el8.5.0+2577+9e95fe001.2.0-16.module_el8.5.0+2577+9e95fe00
AlmaLinux:8glassfish-fastinfosetbefore 1.2.13-9.module_el8.5.0+2577+9e95fe001.2.13-9.module_el8.5.0+2577+9e95fe00
AlmaLinux:8glassfish-jaxb-apibefore 2.2.12-8.module_el8.5.0+2577+9e95fe002.2.12-8.module_el8.5.0+2577+9e95fe00
AlmaLinux:8glassfish-jaxb-corebefore 2.2.11-12.module_el8.10.0+3791+e06379532.2.11-12.module_el8.10.0+3791+e0637953
AlmaLinux:8glassfish-jaxb-runtimebefore 2.2.11-12.module_el8.10.0+3791+e06379532.2.11-12.module_el8.10.0+3791+e0637953
AlmaLinux:8glassfish-jaxb-txw2before 2.2.11-12.module_el8.10.0+3791+e06379532.2.11-12.module_el8.10.0+3791+e0637953
AlmaLinux:8jackson-annotationsbefore 2.21-1.module_el8.10.0+4235+0924958e2.21-1.module_el8.10.0+4235+0924958e
AlmaLinux:8jackson-corebefore 2.21.4-1.module_el8.10.0+4235+0924958e2.21.4-1.module_el8.10.0+4235+0924958e
AlmaLinux:8jackson-databindbefore 2.21.4-1.module_el8.10.0+4235+0924958e2.21.4-1.module_el8.10.0+4235+0924958e
AlmaLinux:8jackson-jaxrs-json-providerbefore 2.21.4-1.module_el8.10.0+4235+0924958e2.21.4-1.module_el8.10.0+4235+0924958e
AlmaLinux:8jackson-jaxrs-providersbefore 2.21.4-1.module_el8.10.0+4235+0924958e2.21.4-1.module_el8.10.0+4235+0924958e
AlmaLinux:8jackson-module-jaxb-annotationsbefore 2.21.4-2.module_el8.10.0+4235+0924958e2.21.4-2.module_el8.10.0+4235+0924958e
AlmaLinux:8jakarta-commons-httpclientbefore 1:3.1-28.module_el8.5.0+2577+9e95fe001:3.1-28.module_el8.5.0+2577+9e95fe00

+96

Same product

fasterxml: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-17485FasterXML jackson-databind through 2.8.10 and 2.9.x through 2.9.3 allows unauthenticated remote code execution because of an incomplete fix
    54Plan
  • CVE-2017-7525A deserialization flaw was discovered in the jackson-databind, versions before 2.6.7.1, 2.7.9.1 and 2.8.9, which could allow an unauthentica
    50Plan
  • CVE-2020-8840FasterXML jackson-databind 2.0.0 through 2.9.10.2 lacks certain xbean-reflect/JNDI blocking, as demonstrated by org.apache.xbean.propertyedi
    47Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-50193Jun 23, 2026 · jackson-databind: Deeply nested JsonNode throws StackOverflowError for toString()
    25Monitor
  • ← EarlierCVE-2026-54512Jun 23, 2026 · jackson-databind: PolymorphicTypeValidator bypass via generic type parameters allows arbitrary class instantiation
    32Monitor
  • Later →CVE-2026-54514Jun 23, 2026 · jackson-databind: InetSocketAddress deserialization triggers eager DNS resolution (SSRF)
    21Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
FasterXML jackson-databind2.18.8 · descriptionVendor (CNA)
almalinux:apache-commons-collections3.2.2-10.module_el8.5.0+2577+9e95fe00 · AlmaLinux:8Package registry (OSV)
almalinux:apache-commons-lang2.6-21.module_el8.5.0+2577+9e95fe00 · AlmaLinux:8Package registry (OSV)
almalinux:apache-commons-net3.6-3.module_el8.5.0+2577+9e95fe00 · AlmaLinux:8Package registry (OSV)
almalinux:bea-stax-api1.2.0-16.module_el8.5.0+2577+9e95fe00 · AlmaLinux:8Package registry (OSV)
almalinux:glassfish-fastinfoset1.2.13-9.module_el8.5.0+2577+9e95fe00 · AlmaLinux:8Package registry (OSV)
almalinux:glassfish-jaxb-api2.2.12-8.module_el8.5.0+2577+9e95fe00 · AlmaLinux:8Package registry (OSV)
almalinux:pki-jackson-annotations2.21-1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:pki-jackson-core2.21.4-1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:pki-jackson-databind2.21.4-1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:pki-jackson-jaxrs-json-provider2.21.4-1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:pki-jackson-jaxrs-providers2.21.4-1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:pki-jackson-module-jaxb-annotations2.21.4-1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:jackson-databind2.18.11-1 · Debian:14Package registry (OSV)
Maven:com.fasterxml.jackson.core:jackson-databind2.18.8Package registry (OSV)
Maven:com.fasterxml.jackson.core:jackson-databind2.21.4Package registry (OSV)
Maven:com.fasterxml.jackson.core:jackson-databind3.1.4Package registry (OSV)
Maven:tools.jackson.core:jackson-databind3.1.4Package registry (OSV)
opensuse:jackson-annotations2.18.8-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:jackson-core2.18.8-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:jackson-databind2.18.8-1.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:apache-commons-collections0:3.2.2-10.module+el8.10.0+20993+d0f024b0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:apache-commons-lang0:2.6-21.module+el8.10.0+20993+d0f024b0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:apache-commons-net0:3.6-3.module+el8.10.0+20993+d0f024b0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:bea-stax0:1.2.0-16.module+el8.10.0+20993+d0f024b0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:bea-stax-api0:1.2.0-16.module+el8.10.0+20993+d0f024b0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:glassfish-fastinfoset0:1.2.13-9.module+el8.10.0+20993+d0f024b0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:glassfish-jaxb0:2.2.11-12.module+el8.10.0+20993+d0f024b0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:glassfish-jaxb-api0:2.2.12-8.module+el8.10.0+21035+a01f6469 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:glassfish-jaxb-core0:2.2.11-12.module+el8.10.0+20993+d0f024b0 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)

+19

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days+1% in 7 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-545120 days apartjackson-databind: PolymorphicTypeValidator bypass via generic type parameters allows arbitrary class instantiation
    32Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-184 · Incomplete List of Disallowed Inputs

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (19 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records