DaveGamble cJSON cJSON_Utils.c cJSONUtils_MergePatch use after free (CVE-2026-87933) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-87933

DaveGamble cJSON cJSON_Utils.c cJSONUtils_MergePatch use after free

Answer in brief

CVE-2026-87933 records a Unknown severity vulnerability in DaveGamble cJSON cJSON_Utils.c cJSONUtils_MergePatch use after free. The current sources do not mark it as known exploited. The current feed maps DaveGamble/cJSON (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 Sep 10, 2026Updated Sep 10, 2026Source checked Sep 10, 2026First seen by HOL Sep 10, 2026Material review Sep 10, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. 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 DaveGamble/cJSON (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
DaveGamble/cJSONgeneric	1.7.0 \|\| 1.7.1 \|\| 1.7.2 \|\| 1.7.3 \|\| 1.7.4 \|\| 1.7.5 \|\| 1.7.6 \|\| 1.7.7 \|\| 1.7.8 \|\| 1.7.9 \|\| 1.7.10 \|\| 1.7.11 \|\| 1.7.12 \|\| 1.7.13 \|\| 1.7.14 \|\| 1.7.15 \|\| 1.7.16 \|\| 1.7.17 \|\| 1.7.18 \|\| 1.7.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for DaveGamble/cJSON.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 10, 2026

Sources and claim methodology

Upstream source description

A vulnerability was found in DaveGamble cJSON up to 1.7.19. The affected element is the function cJSONUtils_MergePatch of the file cJSON_Utils.c. The manipulation results in use after free. The attack may be launched remotely. The exploit has been made public and could be used. The pull request to fix this issue awaits acceptance.

Quoted source text, attributed separately from HOL analysis.