CVE-2026-15331

MEDIUMPre-NVD 5.45.4
EchelonGraph scoreMEDIUM confidence

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

Score 5.4 from GitHub Security Advisory published 2026-07-10. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Elevated
5.4EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (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: 0.6%CVSS: 5.4Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

A vulnerability was identified in zhayujie CowAgent up to 2.1.0. The affected element is the function _add_url/_add_package of the file agent/skills/service.py of the component Skill Installation Handler. The manipulation of the argument Name leads to path traversal. The attack may be initiated remotely. Upgrading to version 2.1.2 is sufficient to fix this issue. The identifier of the patch is e85290cddcbb5ffc9c235927f4c92e5b4c3ec264. It is advisable to upgrade the affected component.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
40
EG Risk 40/100

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)
Severity54% × 45%
The EG Score, 5.4 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 or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.6%
EPSS %ILE
45th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (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

July 10, 2026

Last Modified

July 10, 2026

Advisory Details (5)

Auto-updated Jul 10, 2026
Patch available. Sources: github_commit, github_pr, github_release.
GitHub release Patch Available

2.1.2

Patch available: zhayujie/CowAgent 2.1.2

https://github.com/zhayujie/CowAgent/releases/tag/2.1.2
GitHub pull request Patch Available

fix(security): SSRF protection for vision tool + path traversal guard for skill install

Patch available: zhayujie/CowAgent 2.1.2 (PR #2886 merged 2026-06-11)

https://github.com/zhayujie/CowAgent/pull/2886
Web page

[Security] Authenticated cloud skill installation path traversal writes files outside the intended `skills/` root · Issue #2873 · zhayujie/CowAgent · GitHub

https://github.com/zhayujie/CowAgent/issues/2873
GitHub commit Patch Available

commit e85290cddcbb (zhayujie/CowAgent)

Patch available: zhayujie/CowAgent 2.1.2 (contains commit e85290cddcbb)

https://github.com/zhayujie/CowAgent/commit/e85290cddcbb5ffc9c235927f4c92e5b4c3ec264
Web page

GitHub - zhayujie/CowAgent: Open-source super AI assistant & Agent Harness. Plans tasks, runs tools and skills, self-evolves with memory and knowledge. Multi-model, multi-channel. Lightweight, extensible, one-line install. (formerly chatgpt-on-wechat) · GitHub

https://github.com/zhayujie/CowAgent/

Vendor Advisories for CVE-2026-15331(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 35× 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 100 of 178 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. None are among the latest 100 rows. The 78 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  2. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  3. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  4. 2026-10-12 16:32 UTCEG score recompute
  5. 2026-10-11 20:10 UTCEG score recompute
  6. 2026-10-11 17:22 UTCEG score recompute
  7. 2026-10-11 14:55 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  9. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  10. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  11. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  12. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  14. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  15. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  17. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  18. 2026-10-01 15:59 UTCEG score recompute
  19. 2026-10-01 15:59 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  20. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  21. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  23. 2026-09-28 09:53 UTCEG score recompute
  24. 2026-09-28 09:53 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  25. 2026-09-27 13:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
Show 75 more
  1. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  2. 2026-09-24 11:21 UTCEG score recompute
  3. 2026-09-24 11:20 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  4. 2026-09-23 05:50 UTCEG score recompute
  5. 2026-09-23 05:50 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  6. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.6% · 45th percentile
  7. 2026-09-18 05:25 UTCEG score recompute
  8. 2026-09-18 05:25 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  9. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  10. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  11. 2026-09-14 08:04 UTCEG score recompute
  12. 2026-09-14 08:04 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  13. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  14. 2026-09-13 08:16 UTCEG score recompute
  15. 2026-09-13 08:16 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  16. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  17. 2026-09-12 03:17 UTCEG score recompute
  18. 2026-09-12 03:17 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  19. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  20. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  21. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  22. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  23. 2026-09-08 03:16 UTCEG score recompute
  24. 2026-09-08 03:16 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  25. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  26. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  27. 2026-09-05 21:51 UTCEG score recompute
  28. 2026-09-05 21:51 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  29. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  30. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  31. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  32. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  33. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  34. 2026-08-30 06:41 UTCEG score recompute
  35. 2026-08-30 06:41 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  36. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  37. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  38. 2026-08-27 21:43 UTCEG score recompute
  39. 2026-08-27 21:43 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  40. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  41. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.6% · 44th percentile
  42. 2026-08-26 03:45 UTCEG score recompute
  43. 2026-08-26 03:45 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  44. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  45. 2026-08-25 00:34 UTCEG score recompute
  46. 2026-08-25 00:34 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  47. 2026-08-24 00:45 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  48. 2026-08-23 00:59 UTCEG score recompute
  49. 2026-08-23 00:59 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  50. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  51. 2026-08-22 01:12 UTCEG score recompute
  52. 2026-08-22 01:12 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  53. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  54. 2026-08-21 01:24 UTCEG score recompute
  55. 2026-08-21 01:24 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  56. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  57. 2026-08-20 01:38 UTCEG score recompute
  58. 2026-08-20 01:38 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  59. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  60. 2026-08-18 20:40 UTCEG score recompute
  61. 2026-08-18 20:40 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  62. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  63. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  64. 2026-08-17 13:15 UTCEG score recompute
  65. 2026-08-17 13:15 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  66. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  67. 2026-08-16 13:29 UTCEG score recompute
  68. 2026-08-16 13:29 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  69. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  70. 2026-08-15 13:42 UTCEG score recompute
  71. 2026-08-15 13:42 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  72. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  73. 2026-08-14 13:55 UTCEG score recompute
  74. 2026-08-14 13:55 UTCGHSA enrichmentGHSA-c3mj-x5cv-cphr · GitHub CVSS 5.4
  75. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.4% · 30th percentile

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Frequently asked(5)

What is CVE-2026-15331?
CVE-2026-15331 is a medium-severity vulnerability; its CVE record was published on July 10, 2026. A vulnerability was identified in zhayujie CowAgent up to 2.1.0. The affected element is the function addurl/addpackage of the file agent/skills/service.py of the component Skill Installation Handler. The manipulation of the argument Name leads to path traversal. The attack may be initiated…
When was the CVE record for CVE-2026-15331 published?
The CVE record for CVE-2026-15331 was published on July 10, 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 July 10, 2026; the record at its source may have been updated since.
Is CVE-2026-15331 actively exploited?
CVE-2026-15331 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.6% probability of exploitation in the next 30 days (45th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15331?
CVE-2026-15331 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-15331?
A fix for CVE-2026-15331 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-15331 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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