# CVE-2026-10832: Denial of service in Cryostat 4

> Remote attackers can cause JVM memory exhaustion and denial of service by sending crafted DER payloads to services using the wildfly-elytron-asn1 library.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 18 Sep 2026
- **Updated:** 20 Oct 2026
- **Also known as:** GHSA-mg33-j52w-c777

## What is CVE-2026-10832?

CVE-2026-10832 is a medium-severity denial of service vulnerability in Red Hat Cryostat 4, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A flaw was found in the DERDecoder class within wildfly-elytron-asn1. A remote attacker can exploit this resource exhaustion vulnerability by sending a specially crafted DER (Distinguished Encoding Rules) payload. The decoder attempts to allocate excessive memory based on an inflated length value without proper validation, leading to Java Virtual Machine (JVM) memory exhaustion. This results in a remote Denial of Service (DoS) for services that process untrusted DER/ASN.1 input, including SASL (Simple Authentication and Security Layer) authentication mechanisms and X.500 certificate principal parsing paths.

Weakness: CWE-770 (Allocation of Resources Without Limits or Throttling)

## Which versions are affected by CVE-2026-10832?


## How do I fix CVE-2026-10832?

Upgrade to a fixed version.

## Is CVE-2026-10832 being exploited?

There is no known exploitation of CVE-2026-10832 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-10832 and fix it if it is affected.

What it is: CVE-2026-10832 is a medium-severity denial of service vulnerability in Red Hat Cryostat 4, published on 18 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-10832 in the wild and no public exploit code.

Affected product: Red Hat Cryostat 4. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-10832/ (Markdown: https://insights.sbomify.com/CVE-2026-10832/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-10832
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-10832
- OSV: https://osv.dev/vulnerability/CVE-2026-10832

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-10832/
Summaries are generated and may contain mistakes; the official description above is the record.