VulnerabilityPublished 13 Aug 2026Updated 26 Oct 2026

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

Affects cruftSource GCVE Database

Authoritative record:CVE-2026-67322· High 8.7

Not known to be exploited · CVSS 8.7 High : upgrade to 2.16.0_11 soon.

Data as of 26 Oct 2026, 17:42 UTC

CVSS 4.0 base score

8.7High

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

EPSS: 0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 2.16.0_11

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
Weaponised: 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 26 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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 cruft to 2.16.0_11.

Affected software

Product	Affected	Fixed in
Homebrewcruft`pkg:brew/cruft`Other threats	Affected >=2.9.0 <2.16.0_11	Fixed in 2.16.0_11

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

AI-suggested

A patch is available in GitPython version 2.16.0_11 that fixes this vulnerability. Users should upgrade to this version or later to remediate the issue. Until patched, avoid using Repo.clone_from() with untrusted URLs or ensure environment variables are not exposed in the server process. There is no documented option to disable environment variable expansion for the clone URL in affected versions. The vendor advisory confirms the fix in 2.16.0_11.

Description

GitPython versions up to 3.1.50 contain a vulnerability where the Repo.clone_from() method passes the remote URL through os.path.expandvars(), causing environment variables in the URL to be expanded server-side. This allows an attacker controlling the URL to exfiltrate environment variables such as AWS_SECRET_ACCESS_KEY or GITHUB_TOKEN by embedding them in the URL, which is then sent over the network to an attacker-controlled host. The vulnerability affects all non-Cygwin platforms and is due to polish_url() applying environment variable expansion indiscriminately to remote URLs. A fix is available in version 2.16.0_11.

Impact

An attacker able to supply a clone URL to Repo.clone_from() can cause the server to leak environment variables by embedding them in the URL. This leads to disclosure of sensitive secrets such as AWS credentials or GitHub tokens without any authentication or additional conditions. The secret is sent over the network to an attacker-controlled host during the git clone operation. This exposure can compromise the confidentiality of the server's environment and credentials. The vulnerability has a high severity with a CVSS score of 7.5, reflecting network attack vector, low complexity, no privileges required, no user interaction, and high confidentiality impact.

Summary

The vulnerability in GitPython arises from the polish_url() method calling os.path.expandvars() on the clone URL before passing it to the git clone subprocess. Since os.path.expandvars() replaces $NAME or ${NAME} tokens with environment variable values, an attacker who controls the URL argument to Repo.clone_from() can embed environment variable references that get expanded to secret values on the server. These secrets are then transmitted in the URL to an attacker-controlled host, resulting in secret exfiltration. The unsafe-protocol check is performed on the raw URL before expansion, allowing potential bypass if an attacker can also control environment variables. The flaw affects all releases up to and including 3.1.50 and is confirmed present on the main branch. The issue is fixed in version 2.16.0_11.

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Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 17:42 UTC

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