CVE-2026-67215

Name
CVE-2026-67215
Description
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
disclosure@vulncheck.com https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON.c#L253-L261
disclosure@vulncheck.com https://github.com/DaveGamble/cJSON/blob/v1.7.19/cJSON_Utils.c#L906-L940
disclosure@vulncheck.com https://joshua.hu/cjson-json-parser-cve-vulnerabilities
disclosure@vulncheck.com https://www.vulncheck.com/advisories/cjson-json-patch-copy-add-uncontrolled-recursion-stack-exhaustion

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:davegamble:cjson:*:*:*:*:*:*:*:* cjson >= None <= 1.7.19

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
cjson edge-main 1.7.19-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson edge-main 1.7.19-r0 None possibly vulnerable
cjson edge-main 1.7.18-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson edge-main 1.7.18-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson edge-main 1.7.17-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.24-main 1.7.19-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.23-main 1.7.19-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.22-main 1.7.19-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.22-main 1.7.18-r1 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.22-main 1.7.17-r0 None possibly vulnerable
cjson 3.21-main 1.7.19-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.21-main 1.7.18-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.21-main 1.7.17-r0 None possibly vulnerable
cjson 3.20-main 1.7.19-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.20-main 1.7.18-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.20-main 1.7.17-r0 None possibly vulnerable
cjson 3.19-main 1.7.19-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable
cjson 3.19-main 1.7.17-r0 Jakub Jirutka <jakub@jirutka.cz> possibly vulnerable