virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.13, the generated activate (bash and zsh) and activate.fish scripts place values already escaped by shlex.quote inside an additional quoted context. In the bash and zsh script, a crafted virtual environment path reaches __VIRTUAL_ENV__ when a relocated environment's recorded directory is absent; in the fish script, crafted Tcl or Tk library paths reach __TCL_LIBRARY__ or __TK_LIBRARY__. The surplus quotes can terminate the data-only quoted run and leave shell metacharacters parsed as commands when a user sources the activation script, allowing code execution with that user's privileges. This issue is fixed in version 21.7.13.
CVE-2026-102925
HIGHPre-NVD 7.87.8—Trending — 4 sources updated this week
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (3rd percentile of EPSS-scored CVEs). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed
A fix is available — apply it.
- CVSS v3
- 7.8
- EG Score
- 7.8HIGHmedium confidence
- EG Risk
- 35EG Risk 35/100CISA SSVC
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity78% × 45%Exploitation0% × 40%Automatability0% × 15%CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.2%
- EPSS %ILE
- 3rd
- KEV
- Not listed
CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table
Published
September 29, 2026
Last Modified
September 30, 2026
Advisory Details (4)
Auto-updated Sep 29, 2026Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available
21.7.13
Patch available: pypa/virtualenv 21.7.13
https://github.com/pypa/virtualenv/releases/tag/21.7.13github_commit Patch Available
commit 4d5a105ec2a2 (pypa/virtualenv)
Patch available: pypa/virtualenv 21.7.13 (contains commit 4d5a105ec2a2)
https://github.com/pypa/virtualenv/commit/4d5a105ec2a2723b8c7f4571bb68f4f71d01e3f6github_pr Patch Available
🐛 fix(activation): stop path command injection in bash and fish
Patch available: pypa/virtualenv 21.7.13 (PR #3252 merged 2026-09-18)
https://github.com/pypa/virtualenv/pull/3252github Patch Available
virtualenv bash and fish activation scripts execute commands embedded in paths · Advisory · pypa/virtualenv · GitHub
Affected: 21.7.13 by moving the placeholders outside the surrounding quotes, so each value
https://github.com/pypa/virtualenv/security/advisories/GHSA-p58f-9548-mpm2Vendor Advisories for CVE-2026-102925(2)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(1 across 1 ecosystem)
PyPI(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| virtualenv | 0.8 ... 21.7.9 (282 versions) | 21.7.13 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 15× in last 7d / 15× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-10-04 11:00 UTCVendor advisory
- 2026-10-04 00:11 UTCEG score recompute
- 2026-10-04 00:11 UTCVendor advisory
- 2026-10-03 14:25 UTCEPSS rescore
- 2026-10-03 13:23 UTCVendor advisory
- 2026-10-03 02:33 UTCEG score recompute
- 2026-10-02 04:55 UTCEG score recompute
- 2026-10-01 19:49 UTCEPSS rescore
- 2026-09-30 19:45 UTCEG score recompute
- 2026-09-30 19:36 UTCEG score recompute
- 2026-09-30 18:59 UTCEG score recompute
- 2026-09-30 15:02 UTCEPSS rescore
- 2026-09-29 21:21 UTCEG score recompute
- 2026-09-29 20:59 UTCEG score recompute
- 2026-09-29 20:58 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same CWE)
Same product
6 shownPyPI:virtualenv
Frequently asked(5)
What is CVE-2026-102925?
CVE-2026-102925 is a high vulnerability published on September 29, 2026. virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.13, the generated activate (bash and zsh) and activate.fish scripts place values already escaped by shlex.quote inside an additional quoted context. In the bash and zsh script, a crafted virtual environment path…
When was CVE-2026-102925 disclosed?
CVE-2026-102925 was first published on September 29, 2026, with the most recent update on September 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-102925 actively exploited?
CVE-2026-102925 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (3rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-102925?
CVE-2026-102925 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-102925?
A fix for CVE-2026-102925 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-102925 are linked in the Vendor Advisories panel on this page.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-102925
Is Your Infrastructure Affected by CVE-2026-102925?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.