What is CVE-2017-11342?

CVE-2017-11342 is a high-severity vulnerability in Libsass, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-07-17.

How severe is CVE-2017-11342?

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

Improper input validation in Libsass

CVE-2017-11342

There is an illegal address access in ast.cpp of LibSass 3.4.5. A crafted input will lead to a remote denial of service attack.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-07-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Libsass — versions 3.4.5

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

bugzilla.redhat.com/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2017-11342?: CVE-2017-11342 is a high-severity vulnerability in Libsass, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-07-17.
How severe is CVE-2017-11342?: High severity. CVSS v3 base score is 7.5 out of 10.