CVE-2026-67215

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-29. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
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 through 1.7.19 is vulnerable to uncontrolled recursion leading to stack exhaustion when an untrusted RFC 6902 JSON Patch is applied via cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive(). A patch containing add and copy operations grafts duplicated subtrees to amplify document depth beyond the parser's nesting limit: cJSON_Delete() recurses with no depth bound, and the cJSON_Duplicate() guard CJSON_CIRCULAR_LIMIT is set to 10000, ten times the parser's 1000-level nesting limit and high enough to overflow a default thread stack. An attacker who can supply the patch document can crash the process, resulting in denial of service.

CVSS v3
7.5
EG Score
7.5(medium)
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
38%
KEV
Not listed

Published

July 29, 2026

Last Modified

August 4, 2026

Advisory Details (4)

Auto-updated Jul 29, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic

cJSON JSON Patch copy/add Uncontrolled Recursion Stack Exhaustion | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cjson-json-patch-copy-add-uncontrolled-recursion-stack-exhaustion
generic

cJSON/cJSON_Utils.c at v1.7.19 · DaveGamble/cJSON · GitHub

https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON_Utils.c#L906-L940
generic

cJSON/cJSON.c at v1.7.19 · DaveGamble/cJSON · GitHub

https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON.c#L253-L261
generic🟡 PoC Available

33 Vulnerabilities in cJSON | Joshua Rogers' Scribbles

https://joshua.hu/cjson-json-parser-cve-vulnerabilities

Vendor Advisories for CVE-2026-67215(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
cjson1.7.14-1 ... 1.7.19-2 (16 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
cjson1.7.15-1 ... 1.7.19-2 (16 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
cjson1.7.18-3.1, 1.7.18-3.1+deb13u1, 1.7.18-4, 1.7.19-1, 1.7.19-2——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
cjson1.7.18-3.1, 1.7.18-4, 1.7.19-1, 1.7.19-2——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 108× 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.

Showing the most recent 100 of 121 total refreshes for this CVE.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 23:20 UTCEG score recompute
  3. 2026-08-29 23:20 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 21:30 UTCEG score recompute
  6. 2026-08-27 21:30 UTCGHSA enrichment
  7. 2026-08-27 09:28 UTCGHSA enrichment
  8. 2026-08-26 21:13 UTCEG score recompute
  9. 2026-08-26 21:13 UTCGHSA enrichment
  10. 2026-08-26 14:47 UTCEPSS rescore
  11. 2026-08-26 08:54 UTCGHSA enrichment
  12. 2026-08-25 20:45 UTCEG score recompute
  13. 2026-08-25 20:45 UTCGHSA enrichment
  14. 2026-08-25 13:49 UTCEPSS rescore
  15. 2026-08-25 08:30 UTCGHSA enrichment
  16. 2026-08-24 20:04 UTCEG score recompute
  17. 2026-08-24 20:04 UTCGHSA enrichment
  18. 2026-08-24 08:00 UTCGHSA enrichment
  19. 2026-08-23 19:56 UTCGHSA enrichment
  20. 2026-08-23 07:54 UTCEG score recompute
  21. 2026-08-23 07:54 UTCGHSA enrichment
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-22 19:52 UTCGHSA enrichment
  24. 2026-08-22 07:50 UTCEG score recompute
  25. 2026-08-22 07:50 UTCGHSA enrichment
Show 75 more
  1. 2026-08-21 23:49 UTCEPSS rescore
  2. 2026-08-21 19:48 UTCGHSA enrichment
  3. 2026-08-21 07:46 UTCEG score recompute
  4. 2026-08-21 07:46 UTCGHSA enrichment
  5. 2026-08-20 22:56 UTCEPSS rescore
  6. 2026-08-20 19:44 UTCGHSA enrichment
  7. 2026-08-20 07:41 UTCGHSA enrichment
  8. 2026-08-19 19:39 UTCEG score recompute
  9. 2026-08-19 19:39 UTCGHSA enrichment
  10. 2026-08-19 17:04 UTCEPSS rescore
  11. 2026-08-19 06:48 UTCGHSA enrichment
  12. 2026-08-18 18:36 UTCEG score recompute
  13. 2026-08-18 18:36 UTCGHSA enrichment
  14. 2026-08-18 13:48 UTCEPSS rescore
  15. 2026-08-18 04:38 UTCGHSA enrichment
  16. 2026-08-17 16:34 UTCEG score recompute
  17. 2026-08-17 16:34 UTCGHSA enrichment
  18. 2026-08-17 13:47 UTCEPSS rescore
  19. 2026-08-17 04:27 UTCGHSA enrichment
  20. 2026-08-16 16:24 UTCEG score recompute
  21. 2026-08-16 16:24 UTCGHSA enrichment
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 04:22 UTCEG score recompute
  24. 2026-08-16 04:22 UTCGHSA enrichment
  25. 2026-08-15 16:20 UTCGHSA enrichment
  26. 2026-08-15 04:17 UTCEG score recompute
  27. 2026-08-15 04:17 UTCGHSA enrichment
  28. 2026-08-15 01:30 UTCEPSS rescore
  29. 2026-08-14 16:14 UTCGHSA enrichment
  30. 2026-08-14 04:12 UTCEG score recompute
  31. 2026-08-14 04:12 UTCGHSA enrichment
  32. 2026-08-13 22:00 UTCEPSS rescore
  33. 2026-08-13 16:10 UTCGHSA enrichment
  34. 2026-08-13 04:08 UTCGHSA enrichment
  35. 2026-08-12 16:06 UTCEG score recompute
  36. 2026-08-12 16:06 UTCGHSA enrichment
  37. 2026-08-12 13:51 UTCEPSS rescore
  38. 2026-08-12 04:04 UTCGHSA enrichment
  39. 2026-08-11 16:01 UTCEG score recompute
  40. 2026-08-11 16:01 UTCGHSA enrichment
  41. 2026-08-11 03:59 UTCEG score recompute
  42. 2026-08-11 03:59 UTCGHSA enrichment
  43. 2026-08-11 00:00 UTCEPSS rescore
  44. 2026-08-10 15:57 UTCGHSA enrichment
  45. 2026-08-10 03:39 UTCGHSA enrichment
  46. 2026-08-09 15:37 UTCEG score recompute
  47. 2026-08-09 15:37 UTCGHSA enrichment
  48. 2026-08-09 13:47 UTCEPSS rescore
  49. 2026-08-09 03:35 UTCEG score recompute
  50. 2026-08-09 03:35 UTCGHSA enrichment
  51. 2026-08-08 16:37 UTCEPSS rescore
  52. 2026-08-08 15:33 UTCGHSA enrichment
  53. 2026-08-08 03:30 UTCEG score recompute
  54. 2026-08-08 03:30 UTCGHSA enrichment
  55. 2026-08-07 15:28 UTCGHSA enrichment
  56. 2026-08-07 03:26 UTCGHSA enrichment
  57. 2026-08-06 15:24 UTCEG score recompute
  58. 2026-08-06 15:23 UTCGHSA enrichment
  59. 2026-08-06 13:47 UTCEPSS rescore
  60. 2026-08-06 03:21 UTCEG score recompute
  61. 2026-08-06 03:21 UTCGHSA enrichment
  62. 2026-08-05 19:17 UTCEPSS rescore
  63. 2026-08-05 19:17 UTCEPSS rescore
  64. 2026-08-05 15:19 UTCGHSA enrichment
  65. 2026-08-05 03:17 UTCGHSA enrichment
  66. 2026-08-04 15:14 UTCEG score recompute
  67. 2026-08-04 15:14 UTCGHSA enrichment
  68. 2026-08-04 15:10 UTCEPSS rescore
  69. 2026-08-04 10:39 UTCEPSS rescore
  70. 2026-08-04 07:38 UTCGHSA enrichment
  71. 2026-08-03 19:32 UTCEG score recompute
  72. 2026-08-03 19:32 UTCGHSA enrichment
  73. 2026-08-03 10:36 UTCEPSS rescore
  74. 2026-08-03 07:30 UTCGHSA enrichment
  75. 2026-08-02 19:23 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-67215?
CVE-2026-67215 is a high vulnerability published on July 29, 2026. cJSON through 1.7.19 is vulnerable to uncontrolled recursion leading to stack exhaustion when an untrusted RFC 6902 JSON Patch is applied via cJSONUtilsApplyPatches() or cJSONUtilsApplyPatchesCaseSensitive(). A patch containing add and copy operations grafts duplicated subtrees to amplify document…
When was CVE-2026-67215 disclosed?
CVE-2026-67215 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-67215 actively exploited?
CVE-2026-67215 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 61.8% of all scored CVEs.
What is the CVSS score of CVE-2026-67215?
CVE-2026-67215 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-67215?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-67215, 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

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