CVE-2023-6507 — An issue was found in CPython 3

An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases.

01What is this vulnerability?

An issue was found in CPython 3.12.0 `subprocess` module on POSIX platforms. The issue was fixed in CPython 3.12.1 and does not affect other stable releases.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-12-08T19:15:08.440
• Last modified: 2026-07-31T15:16:26.330

09References

• github.com — https://github.com/python/cpython/commit/10e9bb13b8dcaa414645b9bd10718d8f7179e82…
• github.com — https://github.com/python/cpython/commit/85bbfa8a4bbdbb61a3a84fbd7cb29a4096ab8a0…
• github.com — https://github.com/python/cpython/commit/9fe7655c6ce0b8e9adc229daf681b6d30e6b161…
• github.com — https://github.com/python/cpython/issues/112334
• mail.python.org — https://mail.python.org/archives/list/[email protected]/thread/AUL7QF…
• github.com — https://github.com/python/cpython/commit/10e9bb13b8dcaa414645b9bd10718d8f7179e82…
• github.com — https://github.com/python/cpython/commit/85bbfa8a4bbdbb61a3a84fbd7cb29a4096ab8a0…
• github.com — https://github.com/python/cpython/commit/9fe7655c6ce0b8e9adc229daf681b6d30e6b161…
• github.com — https://github.com/python/cpython/issues/112334
• mail.python.org — https://mail.python.org/archives/list/[email protected]/thread/AUL7QF…