---
title: "CVE-2019-25777: YAML Perl - Remote Code Execution"
description: "YAML for Perl < 1.27_001 contains a code injection vulnerability caused by unrestricted perl/glob document loading, letting attackers execute arbitrary Perl code remotely, exploit requires supplying crafted documents in the same process."
url: https://panop.io/threat-heartbeat/CVE-2019-25777/
---

# CVE-2019-25777 YAML Perl - Remote Code Execution

YAML for Perl < 1.27\_001 contains a code injection vulnerability caused by unrestricted perl/glob document loading, letting attackers execute arbitrary Perl code remotely, exploit requires supplying crafted documents in the same process.

CVSS base score 7.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.34% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2019-25777)

## Details

Type

Remote Code Execution

Impact

Remote Code Execution

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Published

5 October 2026

Updated

15 October 2026

Weakness

[CWE-502](https://cwe.mitre.org/data/definitions/502.html)

## Vendor fix

Upgrade to version 1.27\_001 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2019-25777](https://nvd.nist.gov/vuln/detail/CVE-2019-25777)
- [https://metacpan.org/release/TINITA/YAML-1.28/changes](https://metacpan.org/release/TINITA/YAML-1.28/changes)
- [http://www.openwall.com/lists/oss-security/2026/10/05/7](http://www.openwall.com/lists/oss-security/2026/10/05/7)
- [https://github.com/ingydotnet/yaml-pm/commit/bace96b5e6661d521c7c515c94a09e081c911fce.patch](https://github.com/ingydotnet/yaml-pm/commit/bace96b5e6661d521c7c515c94a09e081c911fce.patch)
- [https://github.com/ingydotnet/yaml-pm/issues/212](https://github.com/ingydotnet/yaml-pm/issues/212)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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