# CVE-2026-61484: Apache Lucy: LucyX::Remote::SearchServer unauthenticated remote Storable::thaw -> RCE/DoS

> Unauthenticated attackers can achieve remote code execution or denial of service via unsafe deserialization in the retired Apache Lucy library.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 Aug 2026
- **Updated:** 4 Sep 2026
- **Also known as:** GHSA-q347-vr2h-mpmx

## What is CVE-2026-61484?

CVE-2026-61484 is a critical unsafe deserialization vulnerability in Apache Lucy, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

** UNSUPPORTED WHEN ASSIGNED ** Deserialization of Untrusted Data vulnerability in Apache Lucy.

This issue affects Apache Lucy: all versions.

As this project is retired, we do not plan to release a version that fixes this issue. Users are recommended to find an alternative or restrict access to the instance to trusted users.

Lucy is now maintained outside of the ASF at https://github.com/lucysearch . 0.8.0 is no longer affected by this issue, because the offending feature has been removed there.

NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2026-61484?

It affects 1 product.


Products: Apache Lucy.

## How do I fix CVE-2026-61484?

No fix has been published for CVE-2026-61484 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-61484 being exploited?

There is no known exploitation of CVE-2026-61484 in the wild and no public exploit code.

## Other vulnerabilities in Apache Lucy

- [CVE-2026-61486](https://insights.sbomify.com/CVE-2026-61486/): Apache Lucy: stack-buffer-overflow in JSON parser error reporter on malformed input (critical 9.8)
- [CVE-2026-61483](https://insights.sbomify.com/CVE-2026-61483/): Apache Lucy: QueryParser unbounded recursion on deeply-nested query -> C-stack-overflow DoS (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-61484 and fix it if it is affected.

What it is: CVE-2026-61484 is a critical unsafe deserialization vulnerability in Apache Lucy, published on 5 Aug 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-2026-61484 in the wild and no public exploit code.

Affected product: Apache Lucy. 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-2026-61484/ (Markdown: https://insights.sbomify.com/CVE-2026-61484/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-61484
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-61484
- OSV: https://osv.dev/vulnerability/CVE-2026-61484

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-61484/
Summaries are generated and may contain mistakes; the official description above is the record.