EUVD-2026-43294
GHSA-vg36-rrrg-4wqv
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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
Network-reachable API requires low-privilege auth (PR:L); prototype pollution yields limited C/I impact with no availability consequence and no scope change.
Primary rating from Vendor (VulDB).
CVSS VectorVendor: VulDB
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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
Lifecycle Timeline
1DescriptionCVE.org
A weakness has been identified in primefaces primereact up to 10.9.8. This issue affects the function ObjectUtils.mutateFieldData of the component API. This manipulation of the argument Field causes improperly controlled modification of object prototype attributes. The attack is possible to be carried out remotely. The project was informed of the problem early through an issue report but has not responded yet. This vulnerability only affects products that are no longer supported by the maintainer.
AnalysisAI
Prototype pollution in PrimeReact (all versions through 10.9.8) allows authenticated remote attackers to improperly modify JavaScript object prototype attributes via the ObjectUtils.mutateFieldData API function by crafting malicious Field argument values. Affected deployments face limited confidentiality and integrity exposure at the vulnerable system level. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session with at least low-privilege access to the application (PR:L per CVSS 4.0 vector) - unauthenticated actors cannot exploit this vulnerability. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N) places this at a medium-range score of 5.3, with network reachability, low complexity, but requiring low-privilege authentication - limiting opportunistic mass exploitation. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An authenticated user with low-level application access sends a crafted API request to a PrimeReact-backed endpoint, supplying a Field argument containing a prototype-polluting key (e.g., __proto__[isAdmin]=true) to the ObjectUtils.mutateFieldData function. The unvalidated key propagates through the object prototype chain, potentially overriding inherited properties across the application runtime and enabling limited data access or integrity manipulation. … |
| Remediation | No vendor-released patch has been identified at time of analysis - the maintainer has not responded to the responsible disclosure report, and the affected product line is end-of-life. … Detailed patch versions, workarounds, and compensating controls in full report. |
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