CVE-2026-29036

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-12. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

cJSON versions 1.5.0 through 1.7.19 contain an incorrectly-resolved name or reference vulnerability in the decode_pointer_inplace() function within cJSON_Utils.c that allows unauthenticated attackers to cause JSON Patch operations to target wrong object keys by supplying crafted JSON Pointer escape sequences (~0 or ~1) in patch paths. Attackers can submit malicious RFC 6902 JSON Patch input to applications using cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive() to silently corrupt data or delete unintended keys, potentially bypassing authorization controls in applications that rely on JSON Patch for access-controlled data modification.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
18%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Aug 11, 2026
No patch confirmed yet.
generic

cJSON 1.7.19 Wrong-Key Modification via JSON Pointer Escape Decoding | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cjson-wrong-key-modification-via-json-pointer-escape-decoding
generic

GitHub - DaveGamble/cJSON: Ultralightweight JSON parser in ANSI C · GitHub

https://github.com/DaveGamble/cJSON

Vendor Advisories for CVE-2026-29036(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 31× in last 7d / 47× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-21 06:44 UTCEG score recompute
  2. 2026-08-21 06:44 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 22:55 UTCEPSS rescore
  5. 2026-08-20 18:42 UTCGHSA enrichment
  6. 2026-08-20 06:41 UTCGHSA enrichment
  7. 2026-08-19 18:39 UTCEG score recompute
  8. 2026-08-19 18:39 UTCGHSA enrichment
  9. 2026-08-19 17:03 UTCEPSS rescore
  10. 2026-08-19 05:52 UTCGHSA enrichment
  11. 2026-08-18 17:50 UTCEG score recompute
  12. 2026-08-18 17:50 UTCGHSA enrichment
  13. 2026-08-18 13:48 UTCEPSS rescore
  14. 2026-08-18 05:31 UTCGHSA enrichment
  15. 2026-08-17 17:29 UTCEG score recompute
  16. 2026-08-17 17:29 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-17 05:24 UTCGHSA enrichment
  19. 2026-08-16 17:16 UTCEG score recompute
  20. 2026-08-16 17:16 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 05:14 UTCEG score recompute
  23. 2026-08-16 05:14 UTCGHSA enrichment
  24. 2026-08-16 02:14 UTCEPSS rescore
  25. 2026-08-15 17:13 UTCGHSA enrichment
Show 22 more
  1. 2026-08-15 05:11 UTCEG score recompute
  2. 2026-08-15 05:11 UTCGHSA enrichment
  3. 2026-08-15 01:30 UTCEPSS rescore
  4. 2026-08-14 17:09 UTCEG score recompute
  5. 2026-08-14 17:09 UTCGHSA enrichment
  6. 2026-08-14 16:35 UTCGHSA enrichment
  7. 2026-08-14 04:33 UTCEG score recompute
  8. 2026-08-14 04:33 UTCGHSA enrichment
  9. 2026-08-13 22:00 UTCEPSS rescore
  10. 2026-08-13 16:31 UTCEG score recompute
  11. 2026-08-13 16:31 UTCGHSA enrichment
  12. 2026-08-13 15:34 UTCEG score recompute
  13. 2026-08-13 15:34 UTCGHSA enrichment
  14. 2026-08-13 10:24 UTCGHSA enrichment
  15. 2026-08-12 22:22 UTCEG score recompute
  16. 2026-08-12 22:22 UTCGHSA enrichment
  17. 2026-08-12 13:50 UTCEPSS rescore
  18. 2026-08-12 10:20 UTCEG score recompute
  19. 2026-08-12 10:20 UTCGHSA enrichment
  20. 2026-08-11 22:18 UTCEG score recompute
  21. 2026-08-11 21:45 UTCEG score recompute
  22. 2026-08-11 21:45 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-29036?
CVE-2026-29036 is a high vulnerability published on August 11, 2026. cJSON versions 1.5.0 through 1.7.19 contain an incorrectly-resolved name or reference vulnerability in the decodepointerinplace() function within cJSONUtils.c that allows unauthenticated attackers to cause JSON Patch operations to target wrong object keys by supplying crafted JSON Pointer escape…
When was CVE-2026-29036 disclosed?
CVE-2026-29036 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-29036 actively exploited?
CVE-2026-29036 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 82.3% of all scored CVEs.
What is the CVSS score of CVE-2026-29036?
CVE-2026-29036 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-29036?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-29036, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-29036

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