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CVE-2018-20133

Code injection in ymlref

9.8 Critical

CVE-2018-20133 is a critical vulnerability (CVSS 9.8) in Ymlref Project Ymlref, published December 17, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.83%, the 79th percentile. No source names a fixed version.

What does this mean?
Severity
9.8 CriticalCVSS 3.0, NVD
Exploit chance
1.83%EPSS, 79th percentile
Exploitation
None knownNot on CISA’s or ENISA’s lists
Fixed in
No fix listedNo source names one

Description

ymlref allows code injection.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

1.83%Up 1.4 points since Apr 14, 2021
90%50%10%1%

Affected products

Affected packages

Affected packages
PackageAffectedFixed
ymlref
PyPI
through 0.1.1None known
ymlref
PyPI
through 0.1.1, plus listed versions
0.1.0
None known
ymlref
PyPI
All versions, plus listed versions
0.1.00.1.1
None known

What each source reports

NVD Score used9.8

ymlref allows code injection.

Record
CVE-2018-20133
CVSS 3.0
9.8 CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-94
Updated
2026-11-02
CVE ListNo score

ymlref allows code injection.

Record
CVE-2018-20133
Updated
2026-11-02
EUVDEUVD-2018-0147No score

ymlref allows code injection.

Record
EUVD-2018-0147
Updated
2026-11-03
GitHub AdvisoriesGHSA-8r8j-xvfj-36f99.3

Code injection in ymlref

ymlref is a library that allows to load Yaml documents and resolve JSON-pointer references inside them. ymlref versions up to 0.1.1 allow code injection.

Record
GHSA-8r8j-xvfj-36f9
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-94
Updated
2026-11-02
OSVGHSA-8r8j-xvfj-36f99.3

Code injection in ymlref

ymlref is a library that allows to load Yaml documents and resolve JSON-pointer references inside them. ymlref versions up to 0.1.1 allow code injection.

Record
GHSA-8r8j-xvfj-36f9
CVSS 4.0
9.3 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-94
Updated
2026-11-02
OSVPYSEC-2018-103No score

ymlref allows code injection.

Record
PYSEC-2018-103
Updated
2026-11-02

History

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

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

References

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