Security readout for executives and security teams
Plain-English summary
Malformed JSON can trigger a stack buffer overflow in unsupported Apache Lucy. A reachable vulnerable deployment could suffer serious confidentiality, integrity, and availability consequences under the published CVSS assessment. Apache plans no fix because the project is retired; affected organizations should replace it, use the maintained external lineage, or isolate access to trusted users.
Executive priority
Treat confirmed deployments accepting untrusted input as an urgent remediation priority. The combination of critical scoring, unauthenticated network conditions, and an unsupported ASF project creates substantial risk. Prioritize containment immediately and fund migration rather than relying on a future Apache patch.
Technical view
CVE-2026-61486 is a CWE-121 stack-based buffer overflow in Apache Lucy’s JSON parser error reporter, triggered by malformed input. The CVSS 3.1 score is 9.8 with a network-accessible, low-complexity, unauthenticated, no-interaction vector. The sources do not establish the precise memory-corruption outcome or affected calling paths.
Likely exposure
Exposure is most likely where unsupported Apache Lucy processes JSON influenced by untrusted network users. Risk is lower when Lucy is absent, the parsing path is unreachable, or access is restricted to trusted users. The supplied evidence does not identify particular deployments, integrations, or exposed interfaces.
Exploitation context
The source bundle marks this CVE as absent from KEV and provides no evidence of active exploitation or a public exploit. The CVSS vector indicates remote, unauthenticated reachability under vulnerable deployment conditions, but actual exploitability depends on whether malformed input can reach the affected JSON error-reporting path.
Researcher notes
The narrative says all Apache Lucy versions are affected and no ASF fix is planned; external lucysearch reportedly fixed the issue in 0.8.0. Supplied structured metadata also lists version "0" with default status "unaffected," creating an ambiguity that requires lineage verification. No root-cause detail, patch commit, proof of concept, or observed impact is provided.
Mitigation direction
- Inventory applications, services, and dependencies containing Apache Lucy.
- Prefer migration from retired Apache Lucy to a supported alternative.
- Where applicable, move to external lucysearch 0.8.0 or later after verifying lineage and compatibility.
- Until replacement, restrict affected instances and their input paths to trusted users.
- Consult current maintainer guidance before selecting or deploying a replacement build.
Validation and detection
- Confirm installed Lucy packages, binaries, source references, versions, and maintainer provenance.
- Determine whether untrusted input can reach Lucy JSON parsing and error handling.
- Verify network and application controls restrict affected instances to trusted users.
- After remediation, confirm retired Apache Lucy components are absent or inaccessible.
- If using external lucysearch, verify the deployed version is 0.8.0 or later.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-121: Exact CWE lookup
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Open ATT&CK lookupCVE-2026-61486 mapping review
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Open ATT&CK lookup- Severity
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://lists.apache.org/thread/z88yv1z19ppsd4td4nqtg7q72fvqh01bCVE reference, apache · vendor-advisory
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.