CVE-2025-71343

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-04. A secondary CVSS source baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated
8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.1Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

picklescan before 0.0.30 fails to detect malicious pickle files that exploit lib2to3.pgen2.pgen.ParserGenerator.make_label function in the reduce method. Attackers can craft malicious pickle files with embedded code that evades detection but executes arbitrary commands when pickle.load() is called.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
52
EG Risk 52/100

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 (value × EchelonGraph’s weight)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
29th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 4, 2026

Last Modified

October 5, 2026

Advisory Details (2)

Auto-updated Jul 4, 2026
Patch available. Sources: github.
Web page

picklescan - Arbitrary Code Execution via lib2to3.pgen2.pgen.ParserGenerator.make_label Detection Bypass | Advisories | VulnCheck

https://www.vulncheck.com/advisories/picklescan-arbitrary-code-execution-via-lib2to3-pgen2-pgen-parsergenerator-make-label-detection-bypass
GitHub advisoryMentions a patch (unverified)

Missing detection when calling built-in python lib2to3.pgen2.pgen.ParserGenerator.make_label · Advisory · mmaitre314/picklescan · GitHub

https://github.com/mmaitre314/picklescan/security/advisories/GHSA-p9w7-82w4-7q8m

Vendor Advisories for CVE-2025-71343(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
picklescan0.0.1 ... 0.0.9 (29 versions)
  • every version up to 0.0.30: fixed in 0.0.30
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 42× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 253 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 154 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 20:20 UTCEG score recompute
  2. 2026-10-11 18:32 UTCEG score recompute
  3. 2026-10-11 15:06 UTCEG score recompute
  4. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  7. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  8. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  10. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  11. 2026-10-05 16:29 UTCEG score recompute
  12. 2026-10-05 16:29 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  13. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  14. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  15. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  16. 2026-09-30 16:28 UTCEG score recompute
  17. 2026-09-30 16:28 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  18. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  19. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  20. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  22. 2026-09-24 14:02 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  23. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  24. 2026-09-23 06:33 UTCEG score recompute
  25. 2026-09-23 06:33 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
Show 74 more
  1. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  3. 2026-09-18 06:11 UTCEG score recompute
  4. 2026-09-18 06:11 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  5. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  6. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  7. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-09-15 03:10 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-09-14 11:44 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  10. 2026-09-14 00:00 UTCEG score recompute
  11. 2026-09-14 00:00 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  12. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-09-13 08:53 UTCEG score recompute
  14. 2026-09-13 08:53 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  15. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  16. 2026-09-12 13:53 UTCEG score recompute
  17. 2026-09-12 13:53 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  18. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  19. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  20. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  21. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  22. 2026-09-07 16:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  23. 2026-09-06 14:16 UTCEG score recompute
  24. 2026-09-06 14:16 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  25. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  26. 2026-09-05 23:37 UTCEG score recompute
  27. 2026-09-05 23:37 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  28. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  29. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  30. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  31. 2026-08-30 22:23 UTCEG score recompute
  32. 2026-08-30 22:23 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  33. 2026-08-30 11:15 UTCEG score recompute
  34. 2026-08-30 11:15 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  35. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  36. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  37. 2026-08-27 22:09 UTCEG score recompute
  38. 2026-08-27 22:09 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  39. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  40. 2026-08-27 02:53 UTCEG score recompute
  41. 2026-08-27 02:53 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  42. 2026-08-26 14:45 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  43. 2026-08-26 14:29 UTCEG score recompute
  44. 2026-08-26 14:29 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  45. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  46. 2026-08-25 13:35 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  47. 2026-08-25 02:24 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  48. 2026-08-24 15:16 UTCEG score recompute
  49. 2026-08-24 15:16 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  50. 2026-08-24 14:16 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  51. 2026-08-24 04:07 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  52. 2026-08-23 16:52 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  53. 2026-08-23 05:44 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  54. 2026-08-22 18:35 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  55. 2026-08-22 05:25 UTCEG score recompute
  56. 2026-08-22 05:25 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  57. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  58. 2026-08-21 15:34 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  59. 2026-08-21 04:25 UTCEG score recompute
  60. 2026-08-21 04:25 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  61. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  62. 2026-08-20 15:51 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  63. 2026-08-20 03:39 UTCEG score recompute
  64. 2026-08-20 03:39 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  65. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  66. 2026-08-19 10:17 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  67. 2026-08-18 22:53 UTCEG score recompute
  68. 2026-08-18 22:53 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  69. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  70. 2026-08-18 11:41 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  71. 2026-08-17 22:46 UTCEG score recompute
  72. 2026-08-17 22:46 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1
  73. 2026-08-17 13:46 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  74. 2026-08-17 06:50 UTCGHSA enrichmentGHSA-8f67-79jr-8vpr · GitHub severity HIGH · GitHub CVSS 8.1

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2025-71343?
CVE-2025-71343 is a high-severity vulnerability; its CVE record was published on July 4, 2026. picklescan before 0.0.30 fails to detect malicious pickle files that exploit lib2to3.pgen2.pgen.ParserGenerator.make_label function in the reduce method. Attackers can craft malicious pickle files with embedded code that evades detection but executes arbitrary commands when pickle.load() is called.
When was CVE-2025-71343 made public?
CVE-2025-71343 was made public on August 26, 2025: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 4, 2026. EchelonGraph's copy of the record carries a last-modified date of October 5, 2026; the record at its source may have been updated since.
Is CVE-2025-71343 actively exploited?
CVE-2025-71343 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-71343?
CVE-2025-71343 has a CVSS base score of 8.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2025-71343?
A fix for CVE-2025-71343 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2025-71343 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2025-71343

Explore →

Is Your Infrastructure Affected by CVE-2025-71343?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs