VDB-422979 · CVE-2026-113718 · GCVE-0-2026-113718

pypa virtualenv up to 21.14.8 Xonsh Activation activate.xsh quote XONSH_ENCODING encoding error

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4.6	$0-$5k	3.34

Summaryinfo

A vulnerability marked as problematic has been reported in pypa virtualenv up to 21.14.8. The impacted element is the function quote of the file activate.xsh of the component Xonsh Activation. Performing a manipulation of the argument XONSH_ENCODING results in encoding error. This vulnerability is cataloged as CVE-2026-113718. The attack must be initiated from a local position. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in pypa virtualenv up to 21.14.8. It has been classified as problematic. This affects the function quote of the file activate.xsh of the component Xonsh Activation. The manipulation of the argument XONSH_ENCODING with an unknown input leads to a encoding error vulnerability. CWE is classifying the issue as CWE-172. The product does not properly encode or decode the data, resulting in unexpected values. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, POSIX xonsh activation quote() uses repr() to write printable non-ASCII prompt or destination data into UTF-8 activate.xsh, while xonsh can read that script using $XONSH_ENCODING. Under a legacy multibyte codec such as GBK or Big5, a UTF-8 trail byte can consume the backslash before an adjacent quote, allowing the literal to close and attacker-influenced statements to execute when the user sources the generated script. This issue is fixed in version 21.14.9.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-113718 since 10/20/2026. The exploitability is told to be easy. Attacking locally is a requirement. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 21.14.9 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

pypa

Name

virtualenv

Version

Website

Product: https://github.com/pypa/virtualenv/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.8
VulDB Meta Temp Score: 4.6

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Encoding error
CWE: CWE-172
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: virtualenv 21.14.9

Timelineinfo

10/20/2026 Advisory disclosed
10/20/2026 +0 days CVE reserved
10/20/2026 +0 days VulDB entry created
10/20/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-113718 (🔒)
GCVE (CVE): GCVE-0-2026-113718
GCVE (VulDB): GCVE-100-422979

Entryinfo

Created: 10/20/2026 22:08
Changes: 10/20/2026 22:08 (70)
Complete: 🔍
Cache ID: 216::103