CVE-2023-33595

FAUCET Score

CVE-2023-33595 is a heap use-after-free vulnerability found in CPython v3.12.0 alpha 7, specifically within the ascii_decode function. This medium-severity vulnerability (CVSS 5.5) requires user interaction for exploitation and could lead to a denial of service, but not confidentiality or integrity impacts. There is currently no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		3.12.0CPE matchmatch criteria	cpe:2.3:a:python:python:3.12.0:alpha7::::::

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

Exploitability Score

1.8

Impact Score

3.6

CvssVersion

3.1

Exploit Intelligence

EPSS Score

0.37%

Probability of exploitation in next 30 days

EPSS Percentile

29.5%

Percentile rank of EPSS score among Peer Group

As of 2026-07-27

Model: v2026.06.15

This CVE's current EPSS score of 0.0037 is in the 37th percentile among its peer group of 5,765 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference

View patch

References

github.com / python/cpython/issues/103824

Issue TrackingVendor Advisory

github.com / python/cpython/pull/103993/commits/c120bc2d354ca3d27d0c7a53bf65574ddaabaf3a

Patch