virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, BatchActivator.quote() returns prompt text unchanged before activate.bat inserts it into a cmd.exe set "VAR=value" statement. An attacker who influences --prompt, VIRTUALENV_PROMPT, or the corresponding configuration value can include a double quote that closes the assignment and leaves following cmd.exe operators as executable syntax. When a user activates the generated Windows environment, the injected commands run with that user's privileges. This issue is fixed in version 21.7.12.
CVE-2026-102937
“—” beside the score: it is equal to the CVSS score beside it.
This high-severity CVE scores 7.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (10th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
Also known asEUVD-2026-89464 (ENISA EUVD) · GHSA-x78j-v8h9-3j2q (GitHub Security Advisories)Source: ENISA EUVD
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.3
- EG Score
- 7.3HIGHmedium confidence
- EG Risk
- 48EG Risk 48/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity73% × 45%Impact severity (EG Severity): CVSS 7.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation0.2% × 40%FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 0.2%
- EPSS %ILE
- 10th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.3): severity, escalated by confirmed exploitation. This CVE's 7.3 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.3 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
- EG Likelihood
- 0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
September 29, 2026
Last Modified
October 2, 2026
Advisory Details (4)
Auto-updated Sep 29, 202621.7.12
Patch available: pypa/virtualenv 21.7.12
https://github.com/pypa/virtualenv/releases/tag/21.7.12commit d721ff140ce4 (pypa/virtualenv)
Patch available: pypa/virtualenv 21.7.12 (contains commit d721ff140ce4)
https://github.com/pypa/virtualenv/commit/d721ff140ce4afdc2a9b76751e4584e25d9fbea6🐛 fix(activation): escape batch quote() against injection
Patch available: pypa/virtualenv 21.7.12 (PR #3250 merged 2026-09-18)
https://github.com/pypa/virtualenv/pull/3250Command injection via --prompt in activate.bat (batch activator) · Advisory · pypa/virtualenv · GitHub
Affected: 21.7.12 by escaping the characters cmd.exe treats as live syntax inside this cons
https://github.com/pypa/virtualenv/security/advisories/GHSA-x78j-v8h9-3j2qVendor Advisories for CVE-2026-102937(7)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:87410Red Hat Product SecurityCritical
Red Hat Security Advisory: RHOAI 2.25.12 - Red Hat OpenShift AI
- RHSA-2026:87124Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.7 Container Release Update
- RHSA-2026:87120Red Hat Product SecurityCritical
Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Container Release Update
- RHSA-2026:86891Red Hat Product SecurityCritical
Red Hat Security Advisory: RHOAI 3.5.2 - Red Hat OpenShift AI
- RHSA-2026:84734Red Hat Product SecurityCritical
Red Hat Security Advisory: RHOAI 3.4.5 - Red Hat OpenShift AI
- CVE-2026-102937Microsoft Security Response Center (MSRC)High
virtualenv: Command injection via --prompt in activate.bat (batch activator)
- GHSA-x78j-v8h9-3j2qGitHub Security AdvisoriesHigh
virtualenv: Command injection via --prompt in activate.bat (batch activator)
Patch Availability(6)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | ansible-automation-platform-26/eda-controller-rhel9:1791945282 | 2026-10-21 | redhat |
| redhat | rhoai/odh-feature-server-rhel9:1792148523 | 2026-10-21 | redhat |
| redhat | ansible-automation-platform-27/eda-controller-rhel9:1792141010 | 2026-10-21 | redhat |
| redhat | rhoai/odh-workbench-codeserver-datascience-cpu-py312-rhel9:1791825469 | 2026-10-21 | redhat |
| redhat | rhoai/odh-trustyai-nemo-guardrails-server-rhel9:1791556128 | 2026-10-19 | redhat |
| pip | virtualenv @ 21.7.12 (fixes <= 21.7.11) | — | ghsa |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(4 across 4 ecosystems)
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python-virtualenv | 20.17.1+ds-1 ... 21.5.1+ds-1 (33 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python-virtualenv | 20.31.2+ds-1 ... 21.5.1+ds-1 (13 versions) |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| python-virtualenv | 20.31.2+ds-1 ... 21.5.1+ds-1 (12 versions) |
| — |
PyPI(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| virtualenv | 0.8 ... 21.7.9 (281 versions) |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 11× in last 7d / 69× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
- 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-11-01 08:00 UTCGHSA enrichmentGHSA-x78j-v8h9-3j2q · GitHub severity HIGH
- 2026-11-01 08:00 UTCEG score recompute
- 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
- 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-27 20:36 UTCEG score recompute
- 2026-10-27 20:36 UTCVendor advisory
- 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-25 14:56 UTCEG score recompute
- 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-20 19:15 UTCEG score recompute
- 2026-10-20 19:15 UTCVendor advisory
- 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-18 05:10 UTCEG score recompute
- 2026-10-17 19:48 UTCEG score recompute
- 2026-10-17 19:48 UTCVendor advisory
Show 54 moreShow fewer
- 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.1% · 3rd percentile
- 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-12 16:40 UTCEG score recompute
- 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-12 03:58 UTCVendor advisory
- 2026-10-11 20:15 UTCEG score recompute
- 2026-10-11 18:28 UTCEG score recompute
- 2026-10-11 15:08 UTCVendor advisory
- 2026-10-11 15:01 UTCEG score recompute
- 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-11 02:21 UTCEG score recompute
- 2026-10-11 02:21 UTCVendor advisory
- 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-10 13:23 UTCVendor advisory
- 2026-10-10 00:36 UTCEG score recompute
- 2026-10-10 00:36 UTCVendor advisory
- 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-09 11:50 UTCVendor advisory
- 2026-10-08 22:46 UTCEG score recompute
- 2026-10-08 22:46 UTCVendor advisory
- 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-08 10:00 UTCEG score recompute
- 2026-10-08 10:00 UTCVendor advisory
- 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-07 21:13 UTCVendor advisory
- 2026-10-07 08:27 UTCVendor advisory
- 2026-10-06 19:38 UTCEG score recompute
- 2026-10-06 19:38 UTCVendor advisory
- 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-06 06:46 UTCVendor advisory
- 2026-10-05 17:54 UTCEG score recompute
- 2026-10-05 17:54 UTCVendor advisory
- 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-05 05:09 UTCEG score recompute
- 2026-10-05 05:09 UTCVendor advisory
- 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-04 16:23 UTCVendor advisory
- 2026-10-04 03:37 UTCVendor advisory
- 2026-10-03 14:51 UTCEG score recompute
- 2026-10-03 14:51 UTCVendor advisory
- 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-10-03 02:05 UTCEG score recompute
- 2026-10-02 13:18 UTCEG score recompute
- 2026-10-02 12:46 UTCEG score recompute
- 2026-10-01 21:20 UTCEG score recompute
- 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-09-30 19:45 UTCEG score recompute
- 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
- 2026-09-29 21:21 UTCEG score recompute
- 2026-09-29 21:05 UTCEG score recomputeFirst assessed: 7.3 HIGH
- 2026-09-29 21:03 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownDebian:12:python-virtualenv · Debian:13:python-virtualenv · PyPI:virtualenv
Same vendor
10 shownredhat:RHSA-2026:86891 · redhat:RHSA-2026:84734
Frequently asked(5)
What is CVE-2026-102937?
When was the CVE record for CVE-2026-102937 published?
Is CVE-2026-102937 actively exploited?
What is the CVSS score of CVE-2026-102937?
How do I remediate CVE-2026-102937?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-102937
Is Your Infrastructure Affected by CVE-2026-102937?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.