CVE-2026-61486Network attack vector

Memory corruption via malformed JSON error reporting

Published Aug 5, 2026 · Updated Aug 5, 2026

Stack-based buffer overflow in Apache Lucy all versions allows remote attackers to corrupt memory via malformed JSON input. The published advisory identifies the JSON parser's error reporter as the locus but does not disclose the affected function or boundary error. Reachability depends on an embedding application passing attacker-controlled JSON to the library; no standalone Lucy service is implicated.

CVSS severity9.8
Critical
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in Apache Lucy all versions allows remote attackers to corrupt memory via malformed JSON input. The published advisory identifies the JSON parser's error reporter as the locus but does not disclose the affected function or boundary error. Reachability depends on an embedding application passing attacker-controlled JSON to the library; no standalone Lucy service is implicated.

The record

CVE
CVE-2026-61486
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
The Apache Software Foundation
Product
Apache Lucy
Classifications
CWE-121
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Lucyversion=0 <=*

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-121Stack-based Buffer Overflow

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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