CVE-2026-2297

MEDIUMNVD 5.75.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.7 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 99% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
5.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.7Exploit: NoneExposed: 0

A fix is available — apply it.

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 v3
5.7
EG Score
5.7(medium)
EPSS
10.2%
KEV
Not listed

Published

March 4, 2026

Last Modified

May 1, 2026

Advisory Details (8)

Auto-updated May 1, 2026
No patch confirmed yet.
generic

oss-security - Fwd: [CVE-2026-2297] SourcelessFileLoader does not use io.open_code()

http://www.openwall.com/lists/oss-security/2026/03/05/6
generic

gh-145506: Fixes CVE-2026-2297 by ensuring SourcelessFileLoader uses io.open_code by zooba · Pull Request #145507 · python/cpython · GitHub

https://github.com/python/cpython/pull/145507
generic

[CVE-2026-2297] SourcelessFileLoader does not use io.open_code() · Issue #145506 · python/cpython · GitHub

https://github.com/python/cpython/issues/145506
generic

[3.14] gh-145506: Fixes CVE-2026-2297 by ensuring SourcelessFileLoade… · python/cpython@e58e980 · GitHub

https://github.com/python/cpython/commit/e58e9802b9bec5cdbf48fc9bf1da5f4fda482e86
generic

gh-145506: Fixes CVE-2026-2297 by ensuring SourcelessFileLoader uses … · python/cpython@a51b1b5 · GitHub

https://github.com/python/cpython/commit/a51b1b512de1d56b3714b65628a2eae2b07e535e
generic

[3.10] gh-145506: Fixes CVE-2026-2297 by ensuring SourcelessFileLoade… · python/cpython@876858c · GitHub

https://github.com/python/cpython/commit/876858c9f65d9ab656c7fa639f268ce7856d89dd
generic

[3.11] gh-145506: Fixes CVE-2026-2297 by ensuring SourcelessFileLoade… · python/cpython@69ddd9b · GitHub

https://github.com/python/cpython/commit/69ddd9bb2cc4bd69b1565647c18659c6a789ccd9
generic

[3.13] gh-145506: Fixes CVE-2026-2297 by ensuring SourcelessFileLoade… · python/cpython@482d6f8 · GitHub

https://github.com/python/cpython/commit/482d6f8bdba9da3725d272e8bb4a2d25fb6a603e

Vendor Advisories for CVE-2026-2297(11)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(10)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhui5/rhua-rhel9:17797982222026-05-27redhat
redhatpython3.12-0:3.12.13-2.el10_22026-05-19redhat
redhatpython3.14-0:3.14.4-2.el10_22026-05-19redhat
redhatpython3.14-0:3.14.4-2.el9_82026-05-19redhat
redhatpython3.12-0:3.12.13-2.el9_82026-05-19redhat
redhatpython3.12-0:3.12.13-2.el8_102026-04-27redhat
redhatpython3-11-main-3.11.15-4.hum12026-04-17redhat
redhatpython3-12-main-3.12.13-3.hum12026-04-17redhat
redhatpython3-14-main-3.14.4-1.hum12026-04-11redhat
redhatpython3-13-main-3.13.13-1.hum12026-04-10redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 8× in last 7d / 42× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 101 total refreshes for this CVE.

  1. 2026-07-12 05:46 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
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  15. 2026-06-29 09:02 UTCOSV refresh
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  18. 2026-06-28 04:56 UTCEPSS rescore
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  20. 2026-06-27 03:08 UTCEPSS rescore
  21. 2026-06-25 13:49 UTCEPSS rescore
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  24. 2026-06-23 21:33 UTCEPSS rescore
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  1. 2026-06-22 14:25 UTCEPSS rescore
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  18. 2026-06-12 01:04 UTCEG score recompute
  19. 2026-06-12 01:04 UTCVendor advisory
  20. 2026-06-12 01:04 UTCGHSA enrichment
  21. 2026-06-11 14:00 UTCEPSS rescore
  22. 2026-06-10 22:18 UTCEPSS rescore
  23. 2026-06-10 22:18 UTCEPSS rescore
  24. 2026-06-10 19:06 UTCEG score recompute
  25. 2026-06-10 19:06 UTCVendor advisory
  26. 2026-06-10 19:06 UTCGHSA enrichment
  27. 2026-06-09 17:58 UTCEG score recompute
  28. 2026-06-09 17:58 UTCVendor advisory
  29. 2026-06-09 17:58 UTCGHSA enrichment
  30. 2026-06-08 14:17 UTCEPSS rescore
  31. 2026-06-08 14:17 UTCEPSS rescore
  32. 2026-06-07 16:10 UTCEG score recompute
  33. 2026-06-07 16:10 UTCVendor advisory
  34. 2026-06-07 16:10 UTCGHSA enrichment
  35. 2026-06-06 13:47 UTCEPSS rescore
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  37. 2026-06-05 22:47 UTCEPSS rescore
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  43. 2026-06-01 13:51 UTCEPSS rescore
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  45. 2026-06-01 11:43 UTCOSV refresh
  46. 2026-05-31 22:30 UTCEPSS rescore
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  50. 2026-05-29 13:44 UTCEPSS rescore
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  65. 2026-05-23 00:09 UTCEG score recompute
  66. 2026-05-22 21:16 UTCEPSS rescore
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  69. 2026-05-20 22:37 UTCEPSS rescore
  70. 2026-05-20 21:57 UTCEG score recompute
  71. 2026-05-20 21:57 UTCVendor advisory
  72. 2026-05-20 21:57 UTCGHSA enrichment
  73. 2026-05-20 11:22 UTCEPSS rescore
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Frequently asked(5)

What is CVE-2026-2297?
CVE-2026-2297 is a medium vulnerability published on March 4, 2026. 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.
When was CVE-2026-2297 disclosed?
CVE-2026-2297 was first published in the National Vulnerability Database on March 4, 2026, with the most recent update on May 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-2297 actively exploited?
CVE-2026-2297 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 10.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-2297?
CVE-2026-2297 has a CVSS v3 base score of 5.7 (NVD).
How do I remediate CVE-2026-2297?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-2297, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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