CVE-2026-31252

MEDIUMNVD 5.75.7
EchelonGraph scoreMEDIUM confidence

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

Score 5.7 from GitHub Security Advisory published 2026-05-11. NVD baseline CVSS 5.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
5.7EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.7Exploit: None knownExposed services: Not assessed

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

CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its model loading component. The framework uses torch.load() to load model weight files (e.g., llm.pt, flow.pt, hift.pt) without enabling the security-restrictive weights_only=True parameter. This allows the deserialization of arbitrary Python objects via the pickle module. An attacker can exploit this by providing a malicious model directory containing specially crafted model files. When a victim starts the CosyVoice Web UI pointing to this directory, arbitrary code is executed on the victim's system during the model loading process.

CVSS v3
5.7
EG Score
5.7MEDIUMmedium confidence
EG Risk
26
EG Risk 26/100

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)
Severity57% × 45%
The EG Score, 5.7 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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: No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines, and watch for a fix.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system within your standard update timelines, and watch for a fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 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 partial (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

May 11, 2026

Last Modified

May 12, 2026

Advisory Details (2)

Auto-updated Jun 15, 2026
No fix on record yet.
Web page

Notion

https://www.notion.so/CVE-2026-31252-35d1e139318881ef8acfcd877a432569
Web page

GitHub - FunAudioLLM/CosyVoice: Multi-lingual large voice generation model, providing inference, training and deployment full-stack ability. · GitHub

https://github.com/FunAudioLLM/CosyVoice

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 25× 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 95 of 213 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. 5 repeat rows among the latest 100 are merged into the row they repeat. The 118 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  6. 2026-10-12 16:15 UTCEG score recompute
  7. 2026-10-11 19:57 UTCEG score recompute
  8. 2026-10-11 17:11 UTCEG score recompute
  9. 2026-10-11 14:39 UTCEG score recompute
  10. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  19. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  24. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
Show 70 more
  1. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  10. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-08-24 14:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-08-23 18:39 UTCEG score recompute
  21. 2026-08-23 18:39 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  22. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  26. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  27. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  28. 2026-08-17 11:11 UTCEG score recompute
  29. 2026-08-17 11:11 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  30. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-08-16 04:26 UTCEG score recompute
  32. 2026-08-16 04:26 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  33. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  34. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  35. 2026-08-14 02:59 UTCEG score recompute
  36. 2026-08-14 02:59 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  37. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  38. 2026-08-12 16:31 UTCEG score recompute
  39. 2026-08-12 16:31 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  40. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  41. 2026-08-11 04:54 UTCEG score recompute
  42. 2026-08-11 04:54 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  43. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  44. 2026-08-10 04:05 UTCEG score recompute
  45. 2026-08-10 04:05 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  46. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  47. 2026-08-09 03:16 UTCEG score recompute
  48. 2026-08-09 03:16 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  49. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  50. 2026-08-08 02:27 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  51. 2026-08-07 01:38 UTCEG score recompute
  52. 2026-08-07 01:38 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  53. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  54. 2026-08-05 21:58 UTCEG score recompute
  55. 2026-08-05 21:58 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  56. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  57. 2026-08-04 03:51 UTCEG score recompute
  58. 2026-08-04 03:51 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  59. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  60. 2026-08-03 02:59 UTCEG score recompute
  61. 2026-08-03 02:59 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  62. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  63. 2026-08-02 02:10 UTCEG score recompute
  64. 2026-08-02 02:10 UTCGHSA enrichmentGHSA-4xxc-9mf8-p66h · GitHub CVSS 5.7
  65. 2026-08-01 04:16 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  66. 2026-07-30 16:27 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  67. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  68. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  69. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  70. 2026-07-25 14:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile

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Frequently asked(5)

What is CVE-2026-31252?
CVE-2026-31252 is a medium-severity vulnerability; its CVE record was published on May 11, 2026. CosyVoice thru commit 6e01309e01bc93bbeb83bdd996b1182a81aaf11e (2025-30-21) contains an insecure deserialization vulnerability (CWE-502) in its model loading component. The framework uses torch.load() to load model weight files (e.g., llm.pt, flow.pt, hift.pt) without enabling the…
When was the CVE record for CVE-2026-31252 published?
The CVE record for CVE-2026-31252 was published on May 11, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of May 12, 2026; the record at its source may have been updated since.
Is CVE-2026-31252 actively exploited?
CVE-2026-31252 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-31252?
CVE-2026-31252 has a CVSS v3 base score of 5.7 (NVD).
How do I remediate CVE-2026-31252?
No fix for CVE-2026-31252 is confirmed yet. Until one is published, restrict network exposure of the affected system — for example, keep it off the internet or limit it to trusted networks — and watch for a fix.

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