CVE-2026-54517 jackson-databind: @JsonView bypass for setterless creator properties
Attackers can bypass @JsonView restrictions to access restricted setterless collection properties in jackson-databind, leading to unauthorized data exposure.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54517?
CVE-2026-54517 is a medium-severity vulnerability in Fasterxml Jackson-Databind, published on 23 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.21.0 until 2.21.4 and 3.1.4, in BeanDeserializer._deserializeUsingPropertyBased, the active-view (@JsonView) filter was applied only to creator properties; the regular property-buffering branch performed no prop.visibleInView(activeView) check. A change making SetterlessProperty.isMerging() return true routed setterless Collection/Map properties through this unguarded path, so a setterless collection annotated with a restricted @JsonView is populated from attacker JSON even when the active view excludes it. This vulnerability is fixed in 2.21.4 and 3.1.4.
Weakness: CWE-863
Which versions are affected by CVE-2026-54517?
6 open source packages ship an affected version, including com.fasterxml.jackson.core:jackson-databind and tools.jackson.core:jackson-databind. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
com.fasterxml.jackson.core:jackson-databind Maven | From 2.21.0 | 2.21.4 |
com.fasterxml.jackson.core:jackson-databind Maven | From 2.21.0 | 2.21.4 |
com.fasterxml.jackson.core:jackson-databind Maven | From 3.0.0 | 3.1.4 |
com.fasterxml.jackson.core:jackson-databind Maven | From 3.0.0 | 3.1.4 |
tools.jackson.core:jackson-databind Maven | From 3.0.0 | 3.1.4 |
tools.jackson.core:jackson-databind Maven | From 3.0.0 | 3.1.4 |
Products include Fasterxml Jackson-Databind.
How do I fix CVE-2026-54517?
Upgrade com.fasterxml.jackson.core:jackson-databind to a fixed version for your release line: 2.21.4 or 3.1.4.
Is CVE-2026-54517 being exploited?
There is no known exploitation of CVE-2026-54517 in the wild and no public exploit code.
Other vulnerabilities in Fasterxml Jackson-Databind
- CVE-2018-11307 Deserialization of Untrusted Data in jackson-databind
- CVE-2026-54512 jackson-databind: PolymorphicTypeValidator bypass via generic type parameters allows arbitrary class instantiation
- CVE-2026-54513 jackson-databind: Array subtype allowlist bypass in BasicPolymorphicTypeValidator (allowIfSubTypeIsArray)
- CVE-2020-14060 Deserialization of untrusted data in Jackson Databind
- CVE-2021-46877 jackson-databind possible Denial of Service if using JDK serialization to serialize JsonNode
Sources
Also known as CLEANSTART-2026-AL85661, CLEANSTART-2026-VQ66047, CLEANSTART-2026-WC26627, CLEANSTART-2026-XQ97878, CLEANSTART-2026-XX16002, DEBIAN-CVE-2026-54517 and 44 more.