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CVE-2026-2297

23
FAUCET Score

CVE-2026-2297 describes a vulnerability in CPython where the SourcelessFileLoader, responsible for handling legacy .pyc files, incorrectly bypasses io.open_code() during file reading. This oversight prevents sys.audit handlers from triggering for relevant audit events. With a CVSS score of 5.7 (Medium), this local vulnerability requires low attack complexity and user privileges, potentially leading to high integrity impact by circumventing audit logging. However, it does not directly impact confidentiality or availability. There is currently no evidence of active exploitation, and no public exploit code is available in Metasploit, Nuclei, or ExploitDB. While there's minimal community discussion and media coverage, it is not on the KEV or Hot List.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0, < 3.13.13CPE match
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*
>= 3.14.0, < 3.14.4CPE match
cpe:2.3:a:python:python:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

5.7MEDIUM

CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
HIGH
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.20%
Probability of exploitation in next 30 days
EPSS Percentile
10.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0020 is in the 49th percentile among its peer group of 15,940 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

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 (3)

ubuntupatch availablevia ubuntu_usn
Product: python3.10 (jammy)Fixed in: 3.10.12-1~22.04.16
ubuntupatch availablevia ubuntu_usn
Product: python3.12 (noble)Fixed in: 3.12.3-1ubuntu0.15
ubuntupatch availablevia ubuntu_usn
Product: python3.14 (resolute)Fixed in: 3.14.4-1ubuntu0.1

Vendor Advisories (2)

ubuntuUSN-8509-1

Python vulnerabilities

Jul 6, 2026
microsoft2026-Mar/CVE-2026-2297Moderate

SourcelessFileLoader does not use io.open_code()

Mar 10, 2026

References

openwall.com / lists/oss-security/2026/03/05/6
github.com / python/cpython/commit/482d6f8bdba9da3725d272e8bb4a2d25fb6a603e
github.com / python/cpython/commit/69ddd9bb2cc4bd69b1565647c18659c6a789ccd9
github.com / python/cpython/commit/876858c9f65d9ab656c7fa639f268ce7856d89dd
github.com / python/cpython/commit/a51b1b512de1d56b3714b65628a2eae2b07e535e
github.com / python/cpython/commit/e58e9802b9bec5cdbf48fc9bf1da5f4fda482e86
github.com / python/cpython/issues/145506
github.com / python/cpython/pull/145507