CVE-2026-12208
CVE-2026-12208 is a medium-severity vulnerability with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- CVSS v2: 5.0
- CVSS v4: 5.5
- EPSS exploit prediction: 0% (23rd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-36682
- Weakness: CWE-94
- Published:
- Last modified:
Description
A weakness has been identified in jsonata-js jsonata up to 2.2.0. The affected element is the function createFrame of the file src/jsonata.js of the component Function Binding Frame System. This manipulation causes improperly controlled modification of object prototype attributes. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Frequently asked questions
- What is CVE-2026-12208?
- A weakness has been identified in jsonata-js jsonata up to 2.2.0. The affected element is the function createFrame of the file src/jsonata.js of the component Function Binding Frame System. This manipulation causes improperly controlled modification of object prototype attributes. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
- How severe is CVE-2026-12208?
- CVE-2026-12208 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability none.
- Is CVE-2026-12208 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-12208?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-12208 have an EU (EUVD) identifier?
- Yes. CVE-2026-12208 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36682.
- When was CVE-2026-12208 published?
- CVE-2026-12208 was published on 2026-06-15 and last updated on 2026-06-17.
References
- https://github.com/OriginSecurityX/jsonata-hasownproperty-bypass
- https://vuldb.com/cve/CVE-2026-12208
- https://vuldb.com/submit/832446
- https://vuldb.com/vuln/370850
- https://vuldb.com/vuln/370850/cti
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