CVE-2026-2297: SourcelessFileLoader does not use io.open_code()
Awaiting analysis
AliasesALPINE-CVE-2026-2297UBUNTU-CVE-2026-2297DEBIAN-CVE-2026-2297CGA-58mf-9mrv-x67rCGA-7967-7qh5-pgf4CGA-7mfj-2x79-6932CGA-88ff-6245-vc44CGA-9frp-664x-hchmCGA-9v4v-c56g-42w4CGA-9vxj-84jq-f4jjCGA-c854-qwwh-8h52CGA-cgff-rrxx-hjw8CGA-f5pf-4q4f-3qqvCGA-g3rm-9mc5-cr46CGA-hh4h-cxxc-8f75CGA-jhx4-wp7v-82cmCGA-mpmq-rf22-68vmCGA-p5gw-jf83-97h2CGA-v6mg-9w36-hr4qCGA-vf8g-7hjc-rh5cCGA-w796-v534-fc9gCGA-w9p2-r75q-g5cwCGA-wh6c-fc87-25qxCGA-xg75-93v7-gqg4SUSE-SU-2026:0971-1openSUSE-SU-2026:10377-1openSUSE-SU-2026:10381-1openSUSE-SU-2026:10394-1openSUSE-SU-2026:10405-1CGA-88gw-63mv-cv2gCGA-9r45-vx75-39vv
Published 04-03-2026Last modified 13-08-2026
Vulnerability summary
CVE-2026-2297 is a medium (CVSS 5.7) Exposure of Resource to Wrong Sphere vulnerability in python software foundation cpython. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.6% of scored vulnerabilities.
Priority
Routine
Not severe (CVSS 5.7, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?CVSS score
5.7/10
010
Medium · v4.0 (CVE.org)EPSS score
0.22%
0%100%
Low · +0.02 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 23 · Related 14MGASA-2026-0455OPENSUSE-SU-2026:10404-1OPENSUSE-SU-2026:10522-1OPENSUSE-SU-2026:20517-1RHSA-2026:10950RHSA-2026:19019RHSA-2026:19064RHSA-2026:19176RHSA-2026:19177RHSA-2026:7443RHSA-2026:7661RHSA-2026:8822RHSA-2026:8824SUSE-SU-2026:1117-1SUSE-SU-2026:1349-1SUSE-SU-2026:1354-1SUSE-SU-2026:20951-1SUSE-SU-2026:20956-1SUSE-SU-2026:21104-1SUSE-SU-2026:21178-1SUSE-SU-2026:23743-1SUSE-SU-2026:4534-1USN-8509-1CGA-HFW3-Q3PH-5FQ4
Timeline
- 04-03-2026PublishedVulnerability first disclosed.
- 13-08-2026Last modifiedVulnerability information updated.
Description
The import hook in CPython that handles legacy *.pyc files (SourcelessFileLoader) is incorrectly handled in FileLoader (a base class) and so does not use io.open_code() to read the .pyc files. sys.audit handlers for this audit event therefore do not fire.
CVSS metrics
7 scores · 7 sources · 1 versionMedium 5.7Preferred score · CVE.org (CNA)
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:NSourcesAll 7 agree
- OSV · AlpineEcosystem advisory · calculated5.7MediumCVSS: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
- OSV · UbuntuEcosystem advisory · calculated5.7MediumCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- OSV · DebianEcosystem advisory · calculated5.7MediumCVSS: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
- OSV · WolfiEcosystem advisory · calculated5.7MediumCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- OSV · ChainguardEcosystem advisory · calculated5.7MediumCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
- NVDNIST5.7MediumCVSS: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
EPSS trend
Probability
0.22%
Chance of exploitation in the next 30 days
Percentile
13%
Versus all other CVEs
30-day change
Increase +0.02 pp
From 0.20% on 04-10-2026
04-10-202603-11-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Version check
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Chainguard13 products
- python-3.10< 3.10.21-r0
- python-3.11< 3.11.16-r1
- python-3.12< 3.12.14-r2
- python-3.13< 3.13.12-r3
- python-3.14< 3.14.3-r3
Wolfi12 products
- python-3.10< 3.10.21-r0
- python-3.11< 3.11.16-r1
- python-3.12< 3.12.14-r2
- python-3.13< 3.13.12-r3
- python-3.14< 3.14.3-r3
Opensuse7 products
- python311&distro=openSUSE Tumbleweed< 3.11.15-2.1
- python312&distro=openSUSE Tumbleweed< 3.12.13-2.1
- python313&distro=openSUSE Tumbleweed< 3.13.12-2.1
- python314&distro=openSUSE Tumbleweed< 3.14.3-3.1
- python39-core&distro=openSUSE Leap 15.6< 3.9.25-150300.4.96.1
Ubuntu7 products
- python3.10< 3.10.12-1~22.04.16
- python3.11All versions (No fix recorded)
- python3.12< 3.12.3-1ubuntu0.15
- python3.13All versions (No fix recorded)
- python3.14All versions (No fix recorded)
Debian4 products
- pypy3All versions (No fix recorded) | < 7.3.22+dfsg-1
- python3.11< 3.11.2-6+deb12u8
- python3.13< 3.13.14-1 | < 3.13.5-2+deb13u1
- python3.14< 3.14.3-4
Alpine1 product
- python3< 3.12.14-r0 | < 3.14.5-r0
Python software foundation1 product
- cpython< 3.10.21 | ≥ 3.11.0, < 3.11.16 | ≥ 3.12.0, < 3.12.14 | ≥ 3.13.0, < 3.13.13 | ≥ 3.14.0, < 3.14.4 | ≥ 3.15.0a1, < 3.15.0a7
7 vendors · 45 products
References
20 linksShow all 20 references
- github.com/python/cpythonPACKAGE