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
Elevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.6%CVSS: 8.8Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

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
8.8HIGHmedium confidence
EG Risk
56
EG Risk 56/100

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%
EPSS PROB
0.6%
EPSS %ILE
46th
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.
githubMentions a patch (unverified)🟡 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 rangeFix by version rangeDependents
fickling0.0.1 ... 0.1.9 (17 versions)
  • every version up to 0.1.11: fixed in 0.1.11
—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 30× 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 219 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

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 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 0.6% probability of exploitation in the next 30 days (46th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-14534?
CVE-2026-14534 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-14534?
A fix for CVE-2026-14534 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-14534 are linked in the Vendor Advisories panel on this page.

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