Bootstrap script exposes PyPI to domain takeover attacks
Source AlienVault OTX General
Not known to be exploited.
Data as of 26 Oct 2026, 08:30 UTC
Rated by Threat Radar · No CVSS score from NVD or the CNA
- EPSS
- 1.7% chance of exploitation in 30 days – higher than 77% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
Public on cve.org; its publication date is not in this record
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.
What to do
AI-suggested
Mitigation involves auditing all Python projects and dependencies for usage of legacy bootstrap scripts that reference python-distribute.org or the 'distribute' module. Remove or replace these with modern packaging tools like setuptools or pip. Avoid hardcoded external domains in build scripts and implement supply chain security practices such as verifying package integrity via checksums and signatures. Monitor the status of python-distribute.org for potential malicious activity. Update CI/CD pipelines to disallow execution of legacy bootstrap scripts or untrusted external code during installation. Engage with open-source communities to deprecate legacy code relying on vulnerable domains and educate developers about supply chain risks. Employ runtime detection and network controls to block access to suspicious domains referenced in build scripts.
Description
A vulnerability in legacy Python packages arises from bootstrap scripts that fetch and execute installation code from the domain python-distribute.org, which is no longer controlled by the original maintainers and is available for takeover. This can lead to arbitrary code execution if an attacker acquires the domain and serves malicious scripts. Affected packages include tornado, pypiserver, and others. The issue is due to the use of hardcoded domains in bootstrap scripts for the obsolete 'distribute' package. No exploits have been observed in the wild, but the risk is significant given the trust in PyPI packages and the potential for supply chain compromise.
Indicators of compromise
Hashes 6
CVEs 1
- CVE-2023-45311