Service interruption via unchecked prototype-key assignment
Published Sep 24, 2025 · Updated Sep 24, 2025
Prototype pollution in csvjson 5.1.0 and earlier allows attackers to interrupt service via crafted JSON or schema headers. The helper.toCsv path passes attacker-controlled parent and row keys to putData, which writes table[parent][row] without blocking proto; addDataInSchema likewise assigns parsed header segments into a plain object. Reachability requires an application to expose csvjson conversion to untrusted input; the documented consequence is service interruption through polluted state.
Summary
What happened
Prototype pollution in csvjson 5.1.0 and earlier allows attackers to interrupt service via crafted JSON or schema headers. The helper.toCsv path passes attacker-controlled parent and row keys to putData, which writes table[parent][row] without blocking proto; addDataInSchema likewise assigns parsed header segments into a plain object. Reachability requires an application to expose csvjson conversion to untrusted input; the documented consequence is service interruption through polluted state.
The record
- CVE
- CVE-2025-57318
- Published
- Sep 24, 2025
- Updated
- Sep 24, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-1321, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 24, 2025CVE publishedPublication date reported by the CVE source.
- Sep 24, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- csvjson prototype-pollution proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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