CVE WatchOct 14, 2026

CVE-2018-20843

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a h

CVSS

7.5

High

EPSS

7.1%

p94

KEV

—

Exploit Today

0-100

Published: Jun 24, 2019 · Last modified: Oct 14, 2026 · CWE-611

EPSS · 30d

7.1%EPSS · 30 days7.1%

2026-10-032026-10-30

Technical description

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

Official references

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CVECVSSEPSSKEVRExploitTitleMod.

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19.2%

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