CVE-2026-14534

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-04. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Trail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules _posixsubprocess, site, and atexit in the UNSAFE_IMPORTS denylist (fickle.py). Because these modules are absent from the denylist, fickling's check_safety() function returns LIKELY_SAFE with zero findings for pickle payloads that invoke dangerous functions including _posixsubprocess.fork_exec (C-level process spawner capable of executing arbitrary binaries), site.execsitecustomize (executes arbitrary site customization code), and atexit._run_exitfuncs (triggers all registered exit handler callbacks). The fickling.load() API chains check_safety() into pickle.loads() as an explicit security gate; a LIKELY_SAFE verdict causes the payload to be deserialized and executed. This shares the same root cause as CVE-2026-22607 (cProfile), CVE-2025-67748 (pty), and CVE-2025-67747 (marshal/types). OvertlyBadEvals does not flag these modules because they are standard library imports. UnsafeImports does not flag them because they are not in the denylist. The UnusedVariables heuristic is defeated by the SETITEMS opcode pattern.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
1%
EPSS %ILE
46%
KEV
Not listed

Published

July 4, 2026

Last Modified

July 10, 2026

Advisory Details (4)

Auto-updated Jul 4, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available🟡 PoC Available

Bypass of check_safety() via unlisted standard library modules (_posixsubprocess, site, atexit) · Advisory · trailofbits/fickling · GitHub

https://github.com/trailofbits/fickling/security/advisories/GHSA-m6fh-58r7-x697
github_release Patch Available

v0.1.11

Patch available: trailofbits/fickling v0.1.11

https://github.com/trailofbits/fickling/releases/tag/v0.1.11
github_pr Patch Available

Expand UNSAFE_IMPORTS blocklist (GHSA-m6fh-58r7-x697)

Patch available: trailofbits/fickling v0.1.11 (PR #272 merged 2026-05-06)

https://github.com/trailofbits/fickling/pull/272
github_commit Patch Available

commit e8408615b63a (trailofbits/fickling)

Patch available: trailofbits/fickling v0.1.11 (contains commit e8408615b63a)

https://github.com/trailofbits/fickling/commit/e8408615b63adf034f891f653692ab9b51f0f5af

Vendor Advisories for CVE-2026-14534(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
fickling0.0.1 ... 0.1.9 (17 versions)0.1.11—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 25× in last 7d / 108× 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 165 total refreshes for this CVE.

  1. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-26 13:59 UTCEG score recompute
  3. 2026-08-26 13:59 UTCGHSA enrichment
  4. 2026-08-25 13:48 UTCEPSS rescore
  5. 2026-08-25 12:11 UTCGHSA enrichment
  6. 2026-08-24 23:16 UTCEG score recompute
  7. 2026-08-24 23:16 UTCGHSA enrichment
  8. 2026-08-24 10:22 UTCEG score recompute
  9. 2026-08-24 10:22 UTCGHSA enrichment
  10. 2026-08-23 21:28 UTCGHSA enrichment
  11. 2026-08-23 08:34 UTCEG score recompute
  12. 2026-08-23 08:34 UTCGHSA enrichment
  13. 2026-08-23 00:19 UTCEPSS rescore
  14. 2026-08-22 19:40 UTCGHSA enrichment
  15. 2026-08-22 06:45 UTCEG score recompute
  16. 2026-08-22 06:45 UTCGHSA enrichment
  17. 2026-08-21 23:48 UTCEPSS rescore
  18. 2026-08-21 17:51 UTCGHSA enrichment
  19. 2026-08-21 04:57 UTCEG score recompute
  20. 2026-08-21 04:57 UTCGHSA enrichment
  21. 2026-08-20 22:55 UTCEPSS rescore
  22. 2026-08-20 16:01 UTCGHSA enrichment
  23. 2026-08-20 03:06 UTCEG score recompute
  24. 2026-08-20 03:05 UTCGHSA enrichment
  25. 2026-08-19 17:03 UTCEPSS rescore
Show 75 more
  1. 2026-08-19 13:52 UTCGHSA enrichment
  2. 2026-08-19 00:56 UTCEG score recompute
  3. 2026-08-19 00:56 UTCGHSA enrichment
  4. 2026-08-18 13:48 UTCEPSS rescore
  5. 2026-08-18 11:41 UTCGHSA enrichment
  6. 2026-08-17 22:45 UTCEG score recompute
  7. 2026-08-17 22:45 UTCGHSA enrichment
  8. 2026-08-17 07:28 UTCGHSA enrichment
  9. 2026-08-16 18:34 UTCEG score recompute
  10. 2026-08-16 18:34 UTCGHSA enrichment
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 05:38 UTCEG score recompute
  13. 2026-08-16 05:38 UTCGHSA enrichment
  14. 2026-08-16 02:14 UTCEPSS rescore
  15. 2026-08-15 16:45 UTCGHSA enrichment
  16. 2026-08-15 03:51 UTCEG score recompute
  17. 2026-08-15 03:51 UTCGHSA enrichment
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 14:56 UTCGHSA enrichment
  20. 2026-08-14 02:02 UTCEG score recompute
  21. 2026-08-14 02:02 UTCGHSA enrichment
  22. 2026-08-13 22:00 UTCEPSS rescore
  23. 2026-08-13 13:08 UTCGHSA enrichment
  24. 2026-08-13 00:14 UTCEG score recompute
  25. 2026-08-13 00:14 UTCGHSA enrichment
  26. 2026-08-12 13:50 UTCEPSS rescore
  27. 2026-08-12 11:20 UTCGHSA enrichment
  28. 2026-08-11 22:26 UTCEG score recompute
  29. 2026-08-11 22:26 UTCGHSA enrichment
  30. 2026-08-11 13:42 UTCEPSS rescore
  31. 2026-08-11 09:32 UTCEG score recompute
  32. 2026-08-11 09:32 UTCGHSA enrichment
  33. 2026-08-10 23:59 UTCEPSS rescore
  34. 2026-08-10 20:38 UTCGHSA enrichment
  35. 2026-08-10 07:43 UTCGHSA enrichment
  36. 2026-08-09 18:49 UTCEG score recompute
  37. 2026-08-09 18:49 UTCGHSA enrichment
  38. 2026-08-09 13:46 UTCEPSS rescore
  39. 2026-08-09 05:56 UTCGHSA enrichment
  40. 2026-08-08 17:02 UTCEG score recompute
  41. 2026-08-08 17:02 UTCGHSA enrichment
  42. 2026-08-08 16:37 UTCEPSS rescore
  43. 2026-08-08 04:07 UTCEG score recompute
  44. 2026-08-08 04:07 UTCGHSA enrichment
  45. 2026-08-07 15:13 UTCGHSA enrichment
  46. 2026-08-07 02:19 UTCEG score recompute
  47. 2026-08-07 02:19 UTCGHSA enrichment
  48. 2026-08-06 13:46 UTCEPSS rescore
  49. 2026-08-06 13:25 UTCGHSA enrichment
  50. 2026-08-06 00:31 UTCEG score recompute
  51. 2026-08-06 00:31 UTCGHSA enrichment
  52. 2026-08-05 19:17 UTCEPSS rescore
  53. 2026-08-05 11:37 UTCGHSA enrichment
  54. 2026-08-04 21:56 UTCEG score recompute
  55. 2026-08-04 21:56 UTCGHSA enrichment
  56. 2026-08-04 15:09 UTCEPSS rescore
  57. 2026-08-04 10:38 UTCEPSS rescore
  58. 2026-08-04 08:36 UTCGHSA enrichment
  59. 2026-08-03 19:25 UTCEG score recompute
  60. 2026-08-03 19:25 UTCGHSA enrichment
  61. 2026-08-03 10:35 UTCEPSS rescore
  62. 2026-08-03 06:31 UTCGHSA enrichment
  63. 2026-08-02 16:39 UTCGHSA enrichment
  64. 2026-08-02 03:45 UTCEG score recompute
  65. 2026-08-02 03:45 UTCGHSA enrichment
  66. 2026-08-02 02:26 UTCEPSS rescore
  67. 2026-08-01 14:51 UTCEG score recompute
  68. 2026-08-01 14:51 UTCGHSA enrichment
  69. 2026-08-01 04:15 UTCEPSS rescore
  70. 2026-08-01 01:57 UTCGHSA enrichment
  71. 2026-07-31 12:21 UTCGHSA enrichment
  72. 2026-07-30 23:26 UTCEG score recompute
  73. 2026-07-30 23:26 UTCGHSA enrichment
  74. 2026-07-30 16:27 UTCEPSS rescore
  75. 2026-07-30 10:31 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-14534?
CVE-2026-14534 is a high vulnerability published on July 4, 2026. Trail of Bits fickling versions up to and including 0.1.10 do not include the Python standard library modules posixsubprocess, site, and atexit in the UNSAFEIMPORTS denylist (fickle.py). Because these modules are absent from the denylist, fickling's checksafety() function returns LIKELYSAFE with…
When was CVE-2026-14534 disclosed?
CVE-2026-14534 was first published in the National Vulnerability Database on July 4, 2026, with the most recent update on July 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-14534 actively exploited?
CVE-2026-14534 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 54.1% of all scored CVEs.
What is the CVSS score of CVE-2026-14534?
CVE-2026-14534 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-14534?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-14534, 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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