CVE-2026-29036
published 2026-08-11CVE-2026-29036: cJSON versions 1.5.0 through 1.7.19 contain an incorrectly-resolved name or reference vulnerability in the decode_pointer_inplace() function within…
PriorityP349high7.5CVSS 3.1
AVNACLPRNUINSUCNIHAN
EPSS
0.44%
37.5th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| davegamble | cjson | — | — |
| davegamble | cjson | 1.5.0 – 1.7.19 | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vendor_redhat7.5HIGH
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VulDB
DaveGamble cJSON up to 1.7.19 JSON Pointer cJSON_Utils.c decode_pointer_inplace path traversal (Nessus ID 335311)
vuldb·2026-09-25·CVSS 7.5
CVE-2026-29036 [HIGH] DaveGamble cJSON up to 1.7.19 JSON Pointer cJSON_Utils.c decode_pointer_inplace path traversal (Nessus ID 335311)
A vulnerability was found in DaveGamble cJSON up to 1.7.19. It has been classified as critical. The affected element is the function decode_pointer_inplace of the file cJSON_Utils.c of the component JSON Pointer. The manipulation leads to path traversal.
This vulnerability is uniquely identified as CVE-2026-29036. The attack is possible to be carried out remotely. No exploit exists.
GHSA
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
ghsa_unreviewed·2026-08-12
CVE-2026-29036 [HIGH] CWE-706 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
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.
Red Hat
cJSON: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding
vendor_redhat·2026-08-11·CVSS 7.5
CVE-2026-29036 [HIGH] CWE-386 cJSON: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding
cJSON: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding
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.
A flaw was found in cJSON, a JSON parser an
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-29036 cjson: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding [epel-all]
bugzilla·2026-08-13·CVSS 7.5
CVE-2026-29036 [HIGH] CVE-2026-29036 cjson: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding [epel-all]
CVE-2026-29036 cjson: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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
Bugzilla
CVE-2026-29036 cjson: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding [fedora-all]
bugzilla·2026-08-13·CVSS 7.5
CVE-2026-29036 [HIGH] CVE-2026-29036 cjson: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding [fedora-all]
CVE-2026-29036 cjson: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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 cJSONUti
Bugzilla
CVE-2026-29036 cJSON: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding
bugzilla·2026-08-11·CVSS 7.5
CVE-2026-29036 [HIGH] CVE-2026-29036 cJSON: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding
CVE-2026-29036 cJSON: cJSON: Data corruption and unauthorized modification via JSON Pointer escape decoding
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.
2026-08-11
Published