CVE-2026-32641 Parseable: Unauthenticated Denial of Service via panic in Kinesis header parsing middleware
Unauthenticated attackers can cause denial of service in Parseable by sending malformed headers that trigger a panic.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-32641?
CVE-2026-32641 is a high-severity denial of service vulnerability in parseablehq parseable, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-32641?
How do I fix CVE-2026-32641?
No fix has been published for CVE-2026-32641 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-32641 being exploited?
There is no known exploitation of CVE-2026-32641 in the wild and no public exploit code.
Sources
Also known as GHSA-x4q9-j9qh-3rpx.