CVE-2021-3028Public exploit

Local code execution via unquoted branch names

Published Jan 13, 2021 · Updated Aug 3, 2024

Code injection in git-big-picture before 1.0.0 allows local users to execute commands through a crafted Git branch name. The ref parser passed git for-each-ref output containing attacker-controlled ref names to Python eval without language-safe quoting. Execution occurs when a user runs git-big-picture against a repository containing the malicious branch, and the command runs with that user's privileges.

CVSS severity9.8
Critical
EPSS probability2.82%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in git-big-picture before 1.0.0 allows local users to execute commands through a crafted Git branch name. The ref parser passed git for-each-ref output containing attacker-controlled ref names to Python eval without language-safe quoting. Execution occurs when a user runs git-big-picture against a repository containing the malicious branch, and the command runs with that user's privileges.

The record

CVE
CVE-2021-3028
Published
Jan 13, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-20, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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