CVE-2020-26682

Exp

In libass 0.14.0, the `ass_outline_construct`'s call to `outline_stroke` causes a signed integer overflow.

Published: 2020-10-16 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-26682 is rated High Exploit Risk (72/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.45%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-26682

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-26682

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-07-22 0.50% 0.45% -0.06%
2 2025-06-16 0.26% 0.50% +0.25%
3 2025-03-30 — 0.26% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-26682

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2020-26682

OS Trackers for CVE-2020-26682

vendor priority summary link
alpine high CVE-2020-26682: 1 source package rows (libass); 2 state rows across 2 repos (3.10-main, 3.11-main); fixed 0, open 2. https://security.alpinelinux.org/vuln/CVE-2020-26682
debian not yet assigned CVE-2020-26682 not yet assigned priority: Debian including 1 source packages (libass), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2020-26682
gentoo normal CVE-2020-26682: 1 GLSA(s) (202012-12), 1 atom(s) (media-libs/libass); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2020-26682
suse high CVE-2020-26682 severity important: SUSE including 10 source package names (0.3.32-3.4:libass9-0.14.0-3.3.1, libass, …), 92 product×package rows across 52 product lines (Container containers/open-webui, HPE Helion OpenStack 8, … (52 product lines)): Fixed 51, Known Not Affected 41. https://www.suse.com/security/cve/CVE-2020-26682/
ubuntu medium CVE-2020-26682 medium priority: Ubuntu including 1 source packages (libass), 16 status rows across 16 suites (bionic, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): not-affected 12, needed 2, ignored 1, released 1. https://ubuntu.com/security/CVE-2020-26682

Affected software / configurations for CVE-2020-26682

Vendor Product Version Raw CPE
libass_project libass 0.14.0 cpe:2.3:a:libass_project:libass:0.14.0:*:*:*:*:*:*:*

References for CVE-2020-26682

URL Tags
http://www.openwall.com/lists/oss-security/2020/11/19/7 Exploit Issue Tracking Mailing List Third Party Advisory
https://github.com/libass/libass/issues/431 Exploit Issue Tracking Third Party Advisory
https://github.com/libass/libass/pull/432 Issue Tracking Third Party Advisory
https://security.gentoo.org/glsa/202012-12 Third Party Advisory
cvelogic Threat Intelligence