CVE-2026-29036

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-12. 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 mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

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

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
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100CISA SSVC

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%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 11, 2026

Last Modified

September 24, 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 rangeFix by version rangeDependents
cjson1.7.15-1 ... 1.7.19-2 (16 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
cjson1.7.18-3.1, 1.7.18-3.1+deb13u1, 1.7.18-4, 1.7.19-1, 1.7.19-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
cjson1.7.18-3.1, 1.7.18-4, 1.7.19-1, 1.7.19-2
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 98× 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 200 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

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 on August 11, 2026, with the most recent update on September 24, 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 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-29036?
CVE-2026-29036 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-29036?
No fix for CVE-2026-29036 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-29036 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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