DaveGamble cJSON up to 1.7.19 cJSONUtils_ApplyPatches recursion

Summaryinfo

A vulnerability marked as problematic has been reported in DaveGamble cJSON up to 1.7.19. The impacted element is the function cJSONUtils_ApplyPatches. Performing a manipulation results in recursion. This vulnerability is identified as CVE-2026-67215. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in DaveGamble cJSON up to 1.7.19. It has been classified as problematic. This affects the function cJSONUtils_ApplyPatches. The manipulation with an unknown input leads to a recursion vulnerability. CWE is classifying the issue as CWE-674. The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. This is going to have an impact on availability. The summary by CVE is:

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.

It is possible to read the advisory at joshua.hu. This vulnerability is uniquely identified as CVE-2026-67215 since 07/28/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• DaveGamble

Name

• cJSON

Version

• 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

CPE 2.3info

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CPE 2.2info

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