CVE-2018-20618

Name: CVE-2018-20618
Creator: NVD / NIST
Published: 2018-12-31T15:29:00.837+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 1.42%

Last modified Jun 17, 2026

CVE-2018-20618 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. ok-file-formats through 2018-10-16 has a heap-based buffer over-read in the ok_mo_decode2 function in ok_mo.c.. EPSS estimates a 1.42% chance of exploitation in the next 30 days.

Description

ok-file-formats through 2018-10-16 has a heap-based buffer over-read in the ok_mo_decode2 function in ok_mo.c.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

1.42%

69.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Ok-File-Formats Project	Ok-File-Formats	<= 2018-10-16

References

https://github.com/brackeen/ok-file-formats/issues/6Exploit, Third Party Advisory
https://github.com/brackeen/ok-file-formats/issues/6Exploit, Third Party Advisory

Timeline

Published: Dec 31, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-20618?

ok-file-formats through 2018-10-16 has a heap-based buffer over-read in the ok_mo_decode2 function in ok_mo.c.

How severe is CVE-2018-20618?

CVE-2018-20618 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 1.42% probability of exploitation in the next 30 days.

How do I fix CVE-2018-20618?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-20618?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST