Bug 2556418 (CVE-2026-113722)

Summary:	CVE-2026-113722 virtualenv: virtualenv: arbitrary code execution via improperly quoted interpreter paths in script launchers
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security DevOps Team <prodsec-dev>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	akhatavk, anpicker, anthomas, aos-team-art-private, aprice, asdas, cmyers, dnakabaa, dpaolell, dschmidt, ehelms, gbenhaim, ggainey, hasun, jdelft, jdobes, jfula, jlanda, jmitchel, jowilson, jpasqual, jsamir, jupierce, juwatts, jwong, kaycoth, kgaikwad, kshier, lcouzens, lgarciaa, mbiarnes, mdellweg, mhulan, niyer, nmoumoul, nyancey, oezr, omaciel, ometelka, orabin, osousa, pcreech, ppalepu, ppostler, prdhamdh, prwatson, ptisnovs, rbobbitt, rchan, sdawley, sghai, sidsharm, simaishi, smallamp, stcannon, suppawar, syedriko, tmalecek, twaugh, vlaad, xdharmai, yguenane, zzhou
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	---
Doc Text:	A flaw was found in virtualenv. Due to improper quoting of interpreter paths when generating script wrappers, an attacker who influences the environment destination path can achieve arbitrary code execution. When a user subsequently executes a generated script launcher, embedded shell commands are evaluated with the privileges of that user.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2561907, 2561908
Bug Blocks:

Description OSIDB Bzimport 2026-10-20 20:01:44 UTC

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, virtualenv's ScriptMakerCustom and pip pass an incompletely quoted interpreter path to distlib ScriptMaker when generating POSIX console scripts. When the path contains a space or produces a shebang longer than 127 bytes, distlib emits a /bin/sh wrapper whose double-quoted interpreter path still expands command substitutions and backticks. An attacker who influences the environment destination can therefore execute commands with the user's privileges when the user later runs a generated launcher; environment creation and activation do not trigger the command. Existing launchers are not repaired by upgrading virtualenv alone and must be regenerated, while a later independent pip installation or upgrade can reintroduce an affected launcher because pip's vendored distlib is unchanged. The virtualenv fix is released in version 21.14.9.