Apache Lucy: stack-buffer-overflow in JSON parser error reporter on malformed input (CVE-2026-61486) | HOL Guard CVE

Critical · CVSS 9.8CVE-2026-61486

Apache Lucy: stack-buffer-overflow in JSON parser error reporter on malformed input

Answer in brief

CVE-2026-61486 records a Critical severity (CVSS 9.8) vulnerability in Apache Lucy: stack-buffer-overflow in JSON parser error reporter on malformed input. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/Apache Lucy (generic), Apache Software Foundation/Apache Lucy (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 5, 2026Updated Sep 4, 2026Source checked Sep 19, 2026First seen by HOL Aug 5, 2026Material review Sep 4, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/Apache Lucy (generic), Apache Software Foundation/Apache Lucy (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:a:apache:lucy::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Apache Software Foundation/Apache Lucygeneric	0	Not reported
Apache Software Foundation/Apache Lucygeneric	>=0 <0.8.0	0.8.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/Apache Lucy, Apache Software Foundation/Apache Lucy.
Review the reported fix. Update Apache Software Foundation/Apache Lucy to 0.8.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source description

** UNSUPPORTED WHEN ASSIGNED ** Stack-based Buffer Overflow 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 . This issue has been fixed in 0.8.0 there. NOTE: This vulnerability only affects products that are no longer supported by the maintainer.

Quoted source text, attributed separately from HOL analysis.