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NVD / CVE Program· CNA GitHub_M

CVE-2026-102930: virtualenv: Downloaded seed wheels (pip/setuptools) are not integrity-checked before use

HighCVSS 7.7 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.19% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. Special conditions such as timing or configuration are required.
  • Fixed version: pypa virtualenv 21.7.12; azl3 python-virtualenv 20.36.1-6 on Azure Linux 3.0 20.36.1-7.

Low priority for now. Upgrade to pypa virtualenv 21.7.12; azl3 python-virtualenv 20.36.1-6 on Azure Linux 3.0 20.36.1-7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, download_wheel() accepts pip and setuptools seed wheels fetched for periodic updates or the --download option without checking their bytes against an authoritative digest equivalent to the embedded wheels' BUNDLE_SHA256 verification. A compromised index, stale mirror, or intercepted TLS connection can substitute a different wheel under the requested distribution, version, and filename, after which virtualenv caches and seeds the attacker-controlled wheel into subsequently created environments. The verification applies to the default PyPI path and is intentionally skipped when PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, or PIP_INDEX configures a custom index that may legitimately publish rebuilt wheels. This issue is fixed in version 21.7.12.

Published
Sep 29, 2026
Updated
Sep 30, 2026
EPSS
0.1% · 9th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
7.7
NVD has not scored this yet; the score shown is the CNA’s.

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • pypa virtualenv

    • < 21.7.12affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12python-virtualenvfrom 0—
openSUSE:Leap 16.0python-virtualenvbefore 20.29.3-160000.4.120.29.3-160000.4.1
openSUSE:Tumbleweedpython-virtualenvbefore 21.14.2-1.121.14.2-1.1
PyPIvirtualenvbefore 21.7.1221.7.12
SUSE:Linux Enterprise Module for Python 3 15 SP7python-virtualenvbefore 20.22.0-150400.9.12.120.22.0-150400.9.12.1
SUSE:Linux Enterprise Server 16.0python-virtualenvbefore 20.29.3-160000.4.120.29.3-160000.4.1

Same product

pypa: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-113776virtualenv activation scripts run code from a path that contains a placeholder name
    31Monitor
  • CVE-2026-113732virtualenv activate.fish runs commands from a path or prompt with a backslash before a quote
    31Monitor
  • CVE-2026-113726virtualenv activate runs commands from the environment name in zsh with PROMPT_SUBST
    31Monitor

Published before and after this one in the same product

  • Later →CVE-2026-102937Sep 29, 2026 · virtualenv: Command injection via --prompt in activate.bat (batch activator)
    29Monitor
  • Later →CVE-2026-102938Sep 29, 2026 · virtualenv writes prompt values into pyvenv.cfg without sanitizing line boundaries, allowing configuration injection
    23Monitor
  • Later →CVE-2026-113713Oct 20, 2026 · virtualenv: Temporary app-data can leave dangling seed package links
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
pypa virtualenv21.7.12 · descriptionVendor (CNA)
azl3 python-virtualenv 20.36.1-6 on Azure Linux 3.020.36.1-7 · Release NotesMicrosoft (MSRC)
opensuse:python-virtualenv21.14.2-1.1 · openSUSE:TumbleweedPackage registry (OSV)
PyPI:virtualenv21.7.12Package registry (OSV)
suse:python-virtualenv20.22.0-150400.9.12.1 · SUSE:Linux Enterprise Module for Python 3 15 SP7Package registry (OSV)
suse:python-virtualenv20.29.3-160000.4.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 14, 2026+45 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-11371721 days apartvirtualenv: Pip seeding with download omits wheel digest verification
    9Monitor

Not on record for this CVE: researcher credit · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
P
Scope
X

Weakness class (CWE)

CWE-494 · Download of Code Without Integrity Check

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓
  3. Exploit maturity— → none

For records you follow, these changes also arrive as notifications. →

References

Show all references (2 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records