CVE-2026-29036

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM 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(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
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.

Affected Packages

(3 across 3 ecosystems)
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 25× in last 7d / 110× 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 152 total refreshes for this CVE.

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

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 82.1% 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-29036

Explore →

Is Your Infrastructure Affected by CVE-2026-29036?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs