CVE-2026-18503

2.4 LOW 0.1% exploit odds Fix listed Other

What it is

Attacker-controlled CSV samples can trigger super-linear regular-expression work during dialect sniffing and consume significant CPU when applications pass unbounded input to csv.Sniffer.sniff().

At a glance

Exploitability: Can be exploited locally on the machine with a low-privilege account, but needs a user to act. Limited direct impact.
Exploit odds: 0.1% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-08-10 14:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-23 20:10 UTC Last updatedMost recent change to the record

Details

Published: 2026-08-10 14:17 UTC
Last modified: 2026-10-23 20:10 UTC
Exploit probability: 0.1% · EPSS, next 30 days
Weakness: CWE-1176
Record status: Awaiting Analysis

Attack profile CVSS 4.0 · 2.4

Attack vector: Local
Complexity: Low
Attack requirements: None
Privileges needed: Low
User interaction: Passive
Confidentiality: None
Integrity: None
Availability: Low

Raw vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/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

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Fix and advisories

References

NVD record · CVE.org record