VulnerabilityPublished 13 Aug 2026Updated 29 Oct 2026

CVE-2026-67322: GitPython · Environment-variable exfiltration via os.path.expandvars() on Repo.clone_from() URL

Affects mistral-vibeSource GCVE Database

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Authoritative record:CVE-2026-67322· High 8.7

Not known to be exploited · CVSS 8.7 High : upgrade to 2.23.0 soon.

Data as of 30 Oct 2026, 08:01 UTC

CVSS 4.0 base score

8.7High

How severe the flaw is on the 0–10 CVSS scale.

Patch: Available – fixed in 2.23.0

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

Attack Vector: Network
Attack Complexity: Low
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: High
Vulnerable system integrity: None
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: High: There is a total loss of confidentiality, resulting in all information within the Vulnerable System being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.
Vulnerable system integrity: None: There is no loss of integrity within the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 1 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade mistral-vibe to 2.23.0.

Affected software

Product	Affected	Fixed in
Homebrewmistral-vibe`pkg:brew/mistral-vibe`Other threats	Affected >=2.1.0 <2.23.0	Fixed in 2.23.0

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix is available in GitPython version 2.23.0. Users should upgrade to this version or later to prevent environment variable expansion in clone URLs. Until patched, avoid using Repo.clone_from() with untrusted URLs or sanitize URLs to remove environment variable tokens. There is no documented option to disable environment variable expansion for clone URLs. Review and restrict environment variables accessible to the GitPython process to reduce risk.

Description

GitPython versions up to 3.1.50 contain a vulnerability where the Repo.clone_from() method expands environment variables in the remote URL using os.path.expandvars(). This allows an attacker controlling the URL argument to embed environment variable tokens that get expanded to secret values from the server's environment and sent to an attacker-controlled host. The flaw arises because polish_url() applies environment variable expansion indiscriminately to URLs, causing secret leakage without any precondition beyond URL submission. A fix is available in version 2.23.0.

Impact

An attacker who can supply a clone URL to Repo.clone_from() can exfiltrate environment variables from the server process by embedding variable tokens in the URL. This leads to disclosure of sensitive secrets such as AWS credentials or GitHub tokens without authentication or additional conditions. The vulnerability crosses trust boundaries between untrusted input and server environment, potentially compromising confidentiality. The clone operation itself may fail, but the secret is already leaked via network requests. The vulnerability has a CVSS score of 7.5 (high severity) with network attack vector, low complexity, no privileges required, and no user interaction needed.

Summary

The vulnerability in GitPython (CVE-2026-67322) occurs because the Repo.clone_from() method passes the remote URL through Git.polish_url(), which calls os.path.expandvars() on the URL on non-Cygwin platforms. This causes any environment variable tokens (e.g., $AWS_SECRET_ACCESS_KEY) in the URL to be expanded to their values from the server process environment. The expanded URL, containing secret values, is then passed to the git clone subprocess, which sends network requests to the attacker-controlled host embedded in the URL, leaking secrets such as AWS keys or GitHub tokens. The unsafe-protocol check is performed on the raw URL before expansion, allowing potential bypass if environment variables are manipulated. The issue affects all GitPython releases up to and including 3.1.50 and is fixed in version 2.23.0.

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Description

AI analysisMachine-generated, updated 30 Oct 2026, 08:01 UTC

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