Every CVE Search/ Get API key

CVE-2018-19838

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow...

6.5 MediumFix available

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, as demonstrated by recursive calls involving clone(), cloneChildren(), and copy().

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

1.93%Up 0.9 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 6.5

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, as demonstrated by recursive calls involving clone(), cloneChildren(), and copy().

Record
CVE-2018-19838
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0
4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness
CWE-400
Updated
2026-11-02
CVE List No score

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, as demonstrated by recursive calls involving clone(), cloneChildren(), and copy().

Record
CVE-2018-19838
Updated
2026-11-02
EUVDEUVD-2018-11513 No score

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, as demonstrated by recursive calls involving clone(), cloneChildren(), and copy().

Record
EUVD-2018-11513
Updated
2026-11-03
GitHub AdvisoriesGHSA-wjrc-f8qw-j9q6 6.5

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow...

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, as demonstrated by recursive calls involving clone(), cloneChildren(), and copy().

Record
GHSA-wjrc-f8qw-j9q6
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-400
Updated
2026-11-02
OSV 6.5

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, as demonstrated by recursive calls involving clone(), cloneChildren(), and copy().

Record
CVE-2018-19838
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2018-19838 6.5

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, as demonstrated by recursive calls involving clone(), cloneChildren(), and copy().

Record
DEBIAN-CVE-2018-19838
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 6 moreShow less
OSVUBUNTU-CVE-2018-19838 6.5

In LibSass prior to 3.5.5, functions inside ast.cpp for IMPLEMENT_AST_OPERATORS expansion allow attackers to cause a denial-of-service resulting from stack consumption via a crafted sass file, as demonstrated by recursive calls involving clone(), cloneChildren(), and copy().

Record
UBUNTU-CVE-2018-19838
CVSS 3.0
6.5 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2020-0049 No score

Updated libsass packages fix security vulnerabilities

Use-after-free vulnerability in sass_context.cpp:handle_error (CVE-2018-11499).

Null pointer dereference in Sass::Selector_List::populate_extends (CVE-2018-19797).

Use-after-free vulnerability exists in the SharedPtr class (CVE-2018-19827).

Stack overflow in Eval::operator() (CVE-2018-19837).

Stack-overflow at IMPLEMENT_AST_OPERATORS expansion (CVE-2018-19838).

Buffer-overflow (OOB read) against some invalid input (CVE-2018-19839).

Null pointer dereference in Sass::Eval::operator() (Sass::Supports_Operator*) (CVE-2018-20190).

Uncontrolled recursion in Sass:Parser:parse_css_variable_value (CVE-2018-20821).

Stack-overflow at Sass::Inspect::operator() (CVE-2018-20822).

Heap-buffer-overflow in Sass::Prelexer::parenthese_scope(char const*) (CVE-2019-6283).

Heap-based buffer over-read exists in Sass:Prelexer:alternatives (CVE-2019-6284).

Heap-based buffer over-read exists in Sass:Prelexer:skip_over_scopes (CVE-2019-6286).

Record
MGASA-2020-0049
Updated
2026-11-02
OSVopenSUSE-SU-2019:1791-1 No score

Security update for libsass

This update for libsass to version 3.6.1 fixes the following issues:

Security issues fixed:

  • CVE-2019-6283: Fixed heap-buffer-overflow in Sass::Prelexer::parenthese_scope(char const*) (boo#1121943).
  • CVE-2019-6284: Fixed heap-based buffer over-read exists in Sass:Prelexer:alternatives (boo#1121944).
  • CVE-2019-6286: Fixed heap-based buffer over-read exists in Sass:Prelexer:skip_over_scopes (boo#1121945).
  • CVE-2018-11499: Fixed use-after-free vulnerability in sass_context.cpp:handle_error (boo#1096894).
  • CVE-2018-19797: Disallowed parent selector in selector_fns arguments (boo#1118301).
  • CVE-2018-19827: Fixed use-after-free vulnerability exists in the SharedPtr class (boo#1118346).
  • CVE-2018-19837: Fixed stack overflow in Eval::operator() (boo#1118348).
  • CVE-2018-19838: Fixed stack-overflow at IMPLEMENT_AST_OPERATORS expansion (boo#1118349).
  • CVE-2018-19839: Fixed buffer-overflow (OOB read) against some invalid input (boo#1118351).
  • CVE-2018-20190: Fixed Null pointer dereference in Sass::Eval::operator()(Sass::Supports_Operator*) (boo#1119789).
  • CVE-2018-20821: Fixed uncontrolled recursion in Sass:Parser:parse_css_variable_value (boo#1133200).
  • CVE-2018-20822: Fixed stack-overflow at Sass::Inspect::operator() (boo#1133201).
Record
openSUSE-SU-2019:1791-1
Updated
2026-11-02
OSVopenSUSE-SU-2019:1800-1 No score

Security update for libsass

This update for libsass to version 3.6.1 fixes the following issues:

Security issues fixed:

  • CVE-2019-6283: Fixed heap-buffer-overflow in Sass::Prelexer::parenthese_scope(char const*) (boo#1121943).
  • CVE-2019-6284: Fixed heap-based buffer over-read exists in Sass:Prelexer:alternatives (boo#1121944).
  • CVE-2019-6286: Fixed heap-based buffer over-read exists in Sass:Prelexer:skip_over_scopes (boo#1121945).
  • CVE-2018-11499: Fixed use-after-free vulnerability in sass_context.cpp:handle_error (boo#1096894).
  • CVE-2018-19797: Disallowed parent selector in selector_fns arguments (boo#1118301).
  • CVE-2018-19827: Fixed use-after-free vulnerability exists in the SharedPtr class (boo#1118346).
  • CVE-2018-19837: Fixed stack overflow in Eval::operator() (boo#1118348).
  • CVE-2018-19838: Fixed stack-overflow at IMPLEMENT_AST_OPERATORS expansion (boo#1118349).
  • CVE-2018-19839: Fixed buffer-overflow (OOB read) against some invalid input (boo#1118351).
  • CVE-2018-20190: Fixed Null pointer dereference in Sass::Eval::operator()(Sass::Supports_Operator*) (boo#1119789).
  • CVE-2018-20821: Fixed uncontrolled recursion in Sass:Parser:parse_css_variable_value (boo#1133200).
  • CVE-2018-20822: Fixed stack-overflow at Sass::Inspect::operator() (boo#1133201).

This update was imported from the openSUSE:Leap:15.0:Update update project.

Record
openSUSE-SU-2019:1800-1
Updated
2026-11-02
OSVopenSUSE-SU-2019:1883-1 No score

Security update for libsass

This update for libsass to version 3.6.1 fixes the following issues:

Security issues fixed:

  • CVE-2019-6283: Fixed heap-buffer-overflow in Sass::Prelexer::parenthese_scope(char const*) (boo#1121943).
  • CVE-2019-6284: Fixed heap-based buffer over-read exists in Sass:Prelexer:alternatives (boo#1121944).
  • CVE-2019-6286: Fixed heap-based buffer over-read exists in Sass:Prelexer:skip_over_scopes (boo#1121945).
  • CVE-2018-11499: Fixed use-after-free vulnerability in sass_context.cpp:handle_error (boo#1096894).
  • CVE-2018-19797: Disallowed parent selector in selector_fns arguments (boo#1118301).
  • CVE-2018-19827: Fixed use-after-free vulnerability exists in the SharedPtr class (boo#1118346).
  • CVE-2018-19837: Fixed stack overflow in Eval::operator() (boo#1118348).
  • CVE-2018-19838: Fixed stack-overflow at IMPLEMENT_AST_OPERATORS expansion (boo#1118349).
  • CVE-2018-19839: Fixed buffer-overflow (OOB read) against some invalid input (boo#1118351).
  • CVE-2018-20190: Fixed Null pointer dereference in Sass::Eval::operator()(Sass::Supports_Operator*) (boo#1119789).
  • CVE-2018-20821: Fixed uncontrolled recursion in Sass:Parser:parse_css_variable_value (boo#1133200).
  • CVE-2018-20822: Fixed stack-overflow at Sass::Inspect::operator() (boo#1133201).

This update was imported from the openSUSE:Leap:15.0:Update update project.

Record
openSUSE-SU-2019:1883-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10988-1 No score

libsass-3_6_5-1-3.6.5-1.2 on GA media

These are all security issues fixed in the libsass-3_6_5-1-3.6.5-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10988-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libsass
Debian:12
 before 3.6.3-1
3.6.3-1
libsass
Debian:13
 before 3.6.3-1
3.6.3-1
libsass
Debian:14
 before 3.6.3-1
3.6.3-1
libsass
Mageia:7
From an advisory covering 12 CVEs
 before 3.6.1-1.mga7
3.6.1-1.mga7
libsass
Ubuntu:16.04:LTS
 All versions, plus listed versions
3.2.5-13.2.5-23.3.2-13.3.4-1
 None known
libsass
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
3.4.3-13.4.6-13.4.8-13.4.8-1ubuntu0.1~esm1
 None known
libsass
openSUSE:Leap 15.0
From an advisory covering 12 CVEs
 before 3.6.1-lp151.3.3.1
3.6.1-lp151.3.3.1
libsass
openSUSE:Leap 15.1
From an advisory covering 12 CVEs
 before 3.6.1-lp151.3.3.1
3.6.1-lp151.3.3.1
libsass
SUSE:Package Hub 15
From an advisory covering 12 CVEs
 before 3.6.1-bp150.3.3.1
3.6.1-bp150.3.3.1
libsass
SUSE:Package Hub 15 SP1
From an advisory covering 12 CVEs
 before 3.6.1-bp151.4.3.1
3.6.1-bp151.4.3.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-19838 is a medium vulnerability (CVSS 6.5) in Sass-lang Libsass, published December 4, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.93%, the 80th percentile. Fixed in libsass 3.6.3-1.

References

Show 33 moreShow less
Pages All vulnerabilities Browse Docs Sources Guide Get API key
MoveEnter Open