What is CVE-2018-17143?

CVE-2018-17143 is a high-severity vulnerability in Golang Net, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2018-09-17.

How severe is CVE-2018-17143?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Golang Net

CVE-2018-17143

The html package (aka x/net/html) through 2018-09-17 in Go mishandles <template><tBody><isindex/action=0>, leading to a "panic: runtime error" in inBodyIM in parse.go during an html.Parse call.

Vulnerability class: Buffer Overflow

Published 2018-09-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.028 (86.1th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.028 · newest: 0.028 · change: 0.000

Affected products

Golang Net
Fedoraproject Fedora — versions 28, 29

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

go-review.googlesource.com/c/net/+/136575 (Patch, Vendor Advisory)
github.com/golang/go/issues/27704 (Exploit, Third Party Advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)

Frequently asked questions

What is CVE-2018-17143?: CVE-2018-17143 is a high-severity vulnerability in Golang Net, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2018-09-17.
How severe is CVE-2018-17143?: High severity. CVSS v3 base score is 7.5 out of 10.