CVE catalog

CVE-2018-11499

libsass: CVE-2018-11499

Severity: Critical · CVSS 9.8CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: May 26, 2018, 8:29:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 3.84% · Oct 25, 2026

A use-after-free vulnerability exists in handle_error() in sass_context.cpp in LibSass 3.4.x and 3.5.x through 3.5.4 that could be leveraged to cause a denial of service (application crash) or possibly unspecified other impact.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libsass	sid	`3.6.5+20231221-3`	fixed
Debian	libsass	forky	`3.6.5+20231221-3`	fixed
Debian	libsass	trixie	`3.6.5+20231221-3`	fixed
Debian	libsass	bookworm	`3.6.5+20220909-1`	fixed
Ubuntu	libsass	pro	`3.4.3-1`	vulnerable
Ubuntu	libsass	pro	`3.4.6-1`	vulnerable
Ubuntu	libsass	pro	`3.4.8-1`	vulnerable
Ubuntu	libsass	pro	`3.4.8-1ubuntu0.1~esm1`	fixed
Ubuntu	libsass	16.04	`3.2.5-1`	vulnerable
Ubuntu	libsass	16.04	`3.2.5-2`	vulnerable
Ubuntu	libsass	16.04	`3.3.2-1`	vulnerable
Ubuntu	libsass	16.04	`3.3.4-1`	vulnerable
Ubuntu	libsass	pro	`3.4.3-1`	vulnerable
Ubuntu	libsass	pro	`3.4.6-1`	vulnerable
Ubuntu	libsass	pro	`3.4.8-1`	vulnerable
Ubuntu	libsass	pro	`3.4.8-1ubuntu0.1~esm1`	fixed
Suse	libsass	package hub 15	`3.6.1-bp150.3.3.1`	fixed
Suse	libsass	package hub 15 sp1	`3.6.1-bp151.4.3.1`	fixed
Opensuse	libsass	leap 15.0	`3.6.1-lp151.3.3.1`	fixed
Opensuse	libsass	leap 15.1	`3.6.1-lp151.3.3.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libsass	source	sid	`3.5.5-3`	not yet assigned	Not reported	[900182]
Debian	libsass	source	forky	`3.5.5-3`	not yet assigned	Not reported	[900182]
Debian	libsass	source	trixie	`3.5.5-3`	not yet assigned	Not reported	[900182]
Debian	libsass	source	bookworm	`3.5.5-3`	not yet assigned	Not reported	[900182]
Ubuntu	libsass	deb	pro	`3.4.8-1ubuntu0.1~esm1`	Not reported	USN-4837-1	Not reported
Ubuntu	libsass	deb	pro	`3.4.8-1ubuntu0.1~esm1`	Not reported	UBUNTU-CVE-2018-11499	Not reported
Suse	libsass	rpm	package hub 15	`3.6.1-bp150.3.3.1`	Not reported	OPENSUSE-SU-2019:1800-1	Not reported
Suse	libsass	rpm	package hub 15 sp1	`3.6.1-bp151.4.3.1`	Not reported	OPENSUSE-SU-2019:1883-1	Not reported
Opensuse	libsass	rpm	leap 15.0	`3.6.1-lp151.3.3.1`	Not reported	OPENSUSE-SU-2019:1791-1	Not reported
Opensuse	libsass	rpm	leap 15.1	`3.6.1-lp151.3.3.1`	Not reported	OPENSUSE-SU-2019:1791-1	Not reported

[Debian bug #900182]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libsass1]Fixed
Source package: [libsass]
Details (2)
- 3.6.5+20220909-1 · amd64 · bookworm
  Fixed · Fixed: 3.5.5-3
  dsa · libsass · debian · bookworm; dsa · libsass · debian · 12
- 3.6.5+20220909-1 · arm64 · bookworm
  Fixed · Fixed: 3.5.5-3
  dsa · libsass · debian · bookworm; dsa · libsass · debian · 12
[libsass-dev]Fixed
Source package: [libsass]
Details (2)
- 3.6.5+20220909-1 · amd64 · bookworm
  Fixed · Fixed: 3.5.5-3
  dsa · libsass · debian · bookworm; dsa · libsass · debian · 12
- 3.6.5+20220909-1 · arm64 · bookworm
  Fixed · Fixed: 3.5.5-3
  dsa · libsass · debian · bookworm; dsa · libsass · debian · 12

[Debian 13 (Trixie)]

[libsass1]Fixed
Source package: [libsass]
Details (2)
- 3.6.5+20231221-3+b1 · amd64 · trixie
  Fixed · Fixed: 3.5.5-3
  dsa · libsass · debian · 13
- 3.6.5+20231221-3+b1 · arm64 · trixie
  Fixed · Fixed: 3.5.5-3
  dsa · libsass · debian · 13
[libsass-dev]Fixed
Source package: [libsass]
Details (2)
- 3.6.5+20231221-3+b1 · amd64 · trixie
  Fixed · Fixed: 3.5.5-3
  dsa · libsass · debian · 13
- 3.6.5+20231221-3+b1 · arm64 · trixie
  Fixed · Fixed: 3.5.5-3
  dsa · libsass · debian · 13

Observed: Oct 23, 2026, 5:33:43 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]