What is "libass"?

libass is a portable subtitle renderer for the ASS/SSA (Advanced Substation Alpha/Substation Alpha) subtitle format.

How to use this package

Quick install

Installs the package into the current environment for this session. Use --build or --runtime to persist it as a build-time or runtime dependency.

min add libass

Declare as a task dependency in minimal.toml

Listing the package under tasks.<name>.packages makes it available inside that task’s sandbox.

[tasks.dev]
packages = ["libass"]

Build-time vs runtime

Choose build-time for tools needed during compilation, runtime for dynamic libraries loaded at runtime.

min add --build libass
min add --runtime libass

Compare versions

to

Dependencies (9)

Dependencies
Name	Version	Kind
base	—	build
fontconfig	2.18.3	runtime
freetype	2.14.3	runtime
fribidi	1.0.16	runtime
glibc	2.44	runtime
harfbuzz	14.5.0	runtime
make	4.4.1	build
pkgconf	3.0.5	build
toolchain	—	build

Dependency changes

Dependants (1)

Dependants
Name	Version
ffmpeg	9.0.2

libass v0.17.575b4692
Diff
Lines:+16 / -3Deps:9
Released: 3 months ago
libass v0.17.41975757
Diff
Lines:+75 / -2Deps:9(+9)
Released: 4 months ago
1. 1975757
  Diff
  Lines:+1Deps:9
  Released: 4 months ago
2. 11a4145
  Diff
  Lines:-1Deps:9
  Released: 6 months ago
3. e3e0bf9
  Diff
  Lines:+3 / -1Deps:9
  Released: 7 months ago
4. 99dfe73
  Diff
  Lines:+71Deps:9(+9)
  Released: 7 months ago

No direct advisories

This package inherits 2 transitive advisories from its dependencies.

Include transitive

Showing 2 transitive advisories via libass's dependencies

Security advisories for this package
	Status	IDs	Package	Version	Severity	Published
Critical (0)
High (1)
	Status	IDs	Package	Version	Severity	Published
	Under investigation	CVE-2026-77214	expat	2.8.3 – 2.8.5	High	5 days ago
Summary libexpat Heap Buffer Over-read in xmlparse.c via XML_ParseBuffer Via fontconfig expat Affected ranges 2.8.3 – 2.8.5 References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77214.json, https://nvd.nist.gov/vuln/detail/CVE-2026-77214, https://www.vulncheck.com/advisories/libexpat-heap-buffer-over-read-in-xmlparse-c-via-xml-parsebuffer Fix: https://github.com/libexpat/libexpat/commit/13c5f63a7f1c52c2feee3b16a1134d4fb68e9ea0 Report: https://github.com/libexpat/libexpat/pull/1393 PACKAGE: https://github.com/libexpat/libexpat
Medium (1)
	Status	IDs	Package	Version	Severity	Published
	Under investigation	GHSA-c4v6-gxrq-6g2x CVE-2026-40930	libpng	1.6.53 – 1.6.59	Medium: 5.4	4 months ago
Summary LIBPNG: Chunk smuggling in push-mode APNG parser via unconsumed chunk body Via freetype libpng Affected ranges 1.6.53 – 1.6.59 CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L References Advisory: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40930.json, https://github.com/pnggroup/libpng/security/advisories/GHSA-c4v6-gxrq-6g2x, https://nvd.nist.gov/vuln/detail/CVE-2026-40930 Fix: https://github.com/pnggroup/libpng/commit/faf06924688b62d7c1654b5ceddedbde66ffadb4 Web: http://www.openwall.com/lists/oss-security/2026/05/15/21
Low (0)
	Status	IDs	Package	Version	Severity	Published
Unknown (0)
	Status	IDs	Package	Version	Severity	Published

Build provenance

For the signed record of what the build used, see the Provenance tab.

56 components

Software Bill of Materials — every package this build depends on
Packages	Version	Repository	License
libassROOT	0.17.5	github.com/libass/libass	ISC
acl	2.4.0	https://storage.googleapis.com/minimal-staging-archives/acl-2.4.0.tar.xzMIRROR	(GPL-2.0-only AND LGPL-2.1-only)
attr	2.6.0	https://storage.googleapis.com/minimal-staging-archives/attr-2.6.0.tar.gzMIRROR	(GPL-2.0-only AND LGPL-2.1-only)
bash	5.3	www.gnu.org/software/bash	GPL-3.0-only
bash-bootstrap	5.3	www.gnu.org/software/bash	GPL-3.0-only
binutils	2.47	www.gnu.org/software/binutils	(GPL-2.0-only AND GPL-3.0-only AND LGPL-2.0-only)
bison	3.8.2	www.gnu.org/software/bison	GPL-3.0-only
bzip2	1.0.8	github.com/libarchive/bzip2	bzip2-1.0.6
coreutils	9.12	www.gnu.org/software/coreutils	GPL-3.0-only
diffutils	3.12	www.gnu.org/software/diffutils	GPL-3.0-only
expat	2.8.5	github.com/libexpat/libexpat	MIT
file	5.48	https://storage.googleapis.com/minimal-staging-archives/file-5.48.tar.gzMIRROR	BSD-2-Clause-Darwin
findutils	4.11.0	www.gnu.org/software/findutils	GPL-3.0-only
flex	2.6.4	github.com/westes/flex	BSD-3-Clause-flex
fontconfig	2.18.3	https://storage.googleapis.com/minimal-staging-archives/fontconfig-2.18.3.tar.xzMIRROR	HPND-sell-variant
freetype	2.14.3	https://storage.googleapis.com/minimal-staging-archives/freetype-2.14.3.tar.xzMIRROR	FTL OR GPL-2.0-or-later
fribidi	1.0.16	github.com/fribidi/fribidi	LGPL-2.1-or-later
gawk	5.4.1	www.gnu.org/software/gawk	GPL-3.0-only
gawk-bootstrap	5.4.1	www.gnu.org/software/gawk	GPL-3.0-only
gcc	15.2.0	www.gnu.org/software/gcc	(GPL-2.0-only AND GPL-3.0-only AND LGPL-2.1-only)
gdbm	1.26	www.gnu.org/software/gdbm	GPL-3.0-only
glib	2.88.3	https://storage.googleapis.com/minimal-staging-archives/glib-2.88.3.tar.xzMIRROR	LGPL-2.1-or-later
glibc	2.44	www.gnu.org/software/glibc	(GPL-2.0-only AND LGPL-2.1-only)
gmp	6.3.0	www.gnu.org/software/gmp	LGPL-3.0-or-later OR GPL-2.0-or-later
gperf	3.3	www.gnu.org/software/gperf	GPL-3.0-only
grep	3.12	www.gnu.org/software/grep	GPL-3.0-only
gzip	1.15	www.gnu.org/software/gzip	GPL-3.0-only
harfbuzz	14.5.0	github.com/harfbuzz/harfbuzz	MIT-Modern-Variant
libcap	2.78	https://storage.googleapis.com/minimal-staging-archives/libcap-2.78.tar.xzMIRROR	BSD-3-Clause OR GPL-2.0-only
libffi	3.8.0	github.com/libffi/libffi	MIT
libpng	1.6.59	github.com/pnggroup/libpng	libpng-2.0
linux_headers	6.12.43	github.com/torvalds/linux	GPL-2.0-only WITH Linux-syscall-note
lz4	1.10.0	github.com/lz4/lz4	BSD-2-Clause AND GPL-2.0-or-later
m4	1.4.21	www.gnu.org/software/m4	GPL-3.0-only
make	4.4.1	www.gnu.org/software/make	GPL-3.0-only
meson	1.12.0	github.com/mesonbuild/meson	Apache-2.0
mpc	1.4.1	www.gnu.org/software/mpc	LGPL-3.0-or-later
mpfr	4.2.2	www.gnu.org/software/mpfr	GPL-3.0-only
ncurses	6.6	www.gnu.org/software/ncurses	X11-distribute-modifications-variant
ninja	1.13.2	github.com/ninja-build/ninja	Apache-2.0
openssl	3.6.5	github.com/openssl/openssl	Apache-2.0
patch	2.8	www.gnu.org/software/patch	GPL-3.0-only
pcre2	10.49	github.com/PCRE2Project/pcre2	BSD-3-Clause WITH PCRE2-exception
perl	5.44.0	github.com/Perl/perl5	Artistic-1.0-Perl OR GPL-1.0-or-later
pkgconf	3.0.5	github.com/pkgconf/pkgconf	ISC
python	3.14.8	github.com/python/cpython	Python-2.0.1
readline	8.3	www.gnu.org/software/readline	GPL-3.0-only
sed	4.10	www.gnu.org/software/sed	GPL-3.0-only
setuptools	84.0.0	github.com/pypa/setuptools	MIT
sqlite	3.53.4	github.com/sqlite/sqlite	blessing
tar	1.35	www.gnu.org/software/tar	GPL-3.0-only
tzdata	2026e	github.com/eggert/tz	LicenseRef-Public-Domain
util-linux	2.42.4	github.com/util-linux/util-linux	GPL-2.0-or-later AND LGPL-2.1-or-later AND BSD-3-Clause
xz	5.8.4	github.com/tukaani-project/xz	(0BSD AND GPL-2.0-only AND GPL-3.0-only AND LGPL-2.1-only)
zlib	1.3.2	github.com/madler/zlib	Zlib
zstd	1.5.7	github.com/facebook/zstd	BSD-3-Clause OR GPL-2.0-only

View packages at a commit

libass

Install package

OpenSSF Score

OpenSSF Scorecard — libass

What is "libass"?

How to use this package

Quick install

Declare as a task dependency in minimal.toml

Build-time vs runtime

Dependencies (9)

Dependency changes

Dependants (1)

Summary

Via

Affected ranges

References

Summary

Via

Affected ranges

CVSS vector

References

Build provenance

Build provenance

Build provenance

56 components

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