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Vulnerabilities

Vulnerability · CVE-2019-25777

CVE-2019-25777 is listed by USN-8925-1: YAML-LibYAML vulnerabilities.

Published Oct 14, 2026 · Canonical Ubuntu

Check if you run it

No confirmed exploitation is on record for CVE-2019-25777. EPSS is 0.34%. Act only if a listed version of Canonical Ubuntu is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.34%
Remediation
Vendor / distro source
Affected products
Canonical Ubuntu

CVE-2019-25777 is listed by USN-8925-1: YAML-LibYAML vulnerabilities.

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2019-25777

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2019-25777. EPSS is 0.34%. Act only if a listed version of Canonical Ubuntu is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.34%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Ubuntu security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2026 · Ubuntu Security Notices

    Detected

    Dominique Dumont discovered that YAML-LibYAML did not correctly handle certain reflection operations. If a user or system were tricked into opening a specially crafted file, an attacker could possibly use this issue to delete files. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2017-20285) It was discovered that YAML-LibYAML did not correctly handle parsing certain documents

Sources

  • CVE.orgVulnerability recordCVE-2019-25777

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2019-25777

    30-day exploitation probability 0.3%

    first.org
  • Ubuntu Security NoticesVendor advisoryCVE-2019-25777

    Dominique Dumont discovered that YAML-LibYAML did not correctly handle certain reflection operations. If a user or system were tricked into opening a specially crafted file, an attacker could possibly use this issue to delete files. This issue only affected Ubuntu 16.04 LTS and U

    ubuntu.com

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.