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No exploitation reportedFix available

CVE-2026-67215

No exploitation reported by the sources we read.

  • Published2026-07-29
  • WeaknessCWE-674

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-07-2914:16CVE publishedNVD

Versions per branch

NVD
Davegamble cjson
BranchAffectedFixed in
1.7≤ 1.7.19no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA1 product

As VulnCheck, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • DaveGamble cJSONother versions: affected
    Affected
    • ≤ 1.7.19no fix statedsemver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-07-29

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • apparmorAzure Linux:3all versions · no fixed version listedand 1 other package
  • cjsonUbuntu:Pro:24.04:LTSall versions · no fixed version listed
  • cjsonUbuntu:Pro:22.04:LTSall versions · no fixed version listed
  • cjsonUbuntu:Pro:20.04:LTSall versions · no fixed version listed
  • cjsonUbuntu:26.10all versions · no fixed version listed
  • cjsonUbuntu:26.04:LTSall versions · no fixed version listed
  • cjsonRoot:Alpine:3.23all versions · fixed in 1.7.19-r10074and 1 other package
  • cjsonRoot:Alpine:3.23all versions · fixed in 1.7.19-r10072and 1 other package

7 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-67215 Red Hat Product Security1 known affected

    cJSON: cJSON: Denial of Service via uncontrolled recursion in JSON Patch application

    cjson.src as a component of Red Hat Satellite 6

Full record on NVD

Fix

  1. Workaround from the vendor Red Hat Product Security CVE-2026-67215 · 1 productTo reduce the risk of exploitation, do not apply RFC 6902 JSON Patch documents originating from untrusted or unauthenticated sources using cJSON's cJSONUtils_ApplyPatches() or cJSONUtils_ApplyPatchesCaseSensitive() functions. Where the JSON Patch feature is not required, avoid calling these functio…
  2. No fix available, says the vendor Red Hat Product Security CVE-2026-67215 · 1 productAffected

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • NVDCVE recordread 2026-10-24
  • CISA-ADPSSVC decisionnone2026-07-29
  • CNACVSS 4.08.7known since 2026-10-24
  • CNACVSS 3.17.5known since 2026-10-24
  • CNAweakness (CWE)CWE-674known since 2026-10-24
  • FIRST EPSSEPSS score0.7 %2026-11-09
  • OSVaffected packages—
  • GitHub Advisoriesadvisory—

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 4.0 vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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
Published
2026-07-29
Last Modified
2026-10-23
NVD status
Analyzed
GitHub Advisory
GHSA-5q3m-r3x7-8phg

Frequently asked questions

What is CVE-2026-67215?

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.

Is CVE-2026-67215 actively exploited?

Active exploitation of CVE-2026-67215 has not been confirmed. Its EPSS score was 0.7% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-67215?

CVE-2026-67215 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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