What is CVE-2018-10243?

CVE-2018-10243 is a critical-severity vulnerability in Oisf Libhtp, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-04-04.

How severe is CVE-2018-10243?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Out-of-bounds Read in Oisf Libhtp

CVE-2018-10243

htp_parse_authorization_digest in htp_parsers.c in LibHTP 0.5.26 allows remote attackers to cause a heap-based buffer over-read via an authorization digest header.

Vulnerability class: Buffer Overflow

Published 2019-04-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.023 (82.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 82.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.023 · newest: 0.023 · change: 0.000

Affected products

Oisf Libhtp — versions 0.5.26

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

suricata-ids.org/2018/07/18/suricata-4-0-5-available/ (Release Notes, Vendor Advisory)
lists.debian.org/debian-lts-announce/2019/04/msg00010.html (mailing-list)

Frequently asked questions

What is CVE-2018-10243?: CVE-2018-10243 is a critical-severity vulnerability in Oisf Libhtp, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2019-04-04.
How severe is CVE-2018-10243?: Critical severity. CVSS v3 base score is 9.8 out of 10.