CVE-2026-74858

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

Score 6.3 from GitHub Security Advisory published 2026-08-17. a secondary CVSS source baseline 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0

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

A vulnerability has been found in jae-jae fetcher-mcp up to 0.3.9. Impacted is the function fetch_url/fetch_urls of the file /latest/meta-data/iam/security-credentials/ of the component URL Validation. Such manipulation leads to server-side request forgery. It is possible to launch the attack remotely. The project was informed of the problem early through an issue report but has not responded yet.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity63% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
11%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 20, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

[BUG] - `fetch_url` and `fetch_urls` allow non-blind SSRF to internal network targets · Issue #37 · jae-jae/fetcher-mcp · GitHub

https://github.com/jae-jae/fetcher-mcp/issues/37
generic

GitHub - jae-jae/fetcher-mcp: MCP server for fetch web page content using Playwright headless browser. · GitHub

https://github.com/jae-jae/fetcher-mcp/

Vendor Advisories for CVE-2026-74858(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 17× in last 7d / 77× 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.

  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-20 14:14 UTCEG score recompute
  3. 2026-09-20 14:14 UTCGHSA enrichment
  4. 2026-09-19 12:45 UTCEG score recompute
  5. 2026-09-19 12:45 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 11:58 UTCEG score recompute
  8. 2026-09-18 11:58 UTCGHSA enrichment
  9. 2026-09-17 11:10 UTCEG score recompute
  10. 2026-09-17 11:10 UTCGHSA enrichment
  11. 2026-09-16 14:08 UTCEPSS rescore
  12. 2026-09-16 10:15 UTCEG score recompute
  13. 2026-09-16 10:15 UTCGHSA enrichment
  14. 2026-09-16 05:15 UTCEPSS rescore
  15. 2026-09-15 08:30 UTCEG score recompute
  16. 2026-09-15 08:30 UTCGHSA enrichment
  17. 2026-09-15 03:12 UTCEPSS rescore
  18. 2026-09-14 07:43 UTCEG score recompute
  19. 2026-09-14 07:43 UTCGHSA enrichment
  20. 2026-09-13 06:56 UTCEG score recompute
  21. 2026-09-13 06:56 UTCGHSA enrichment
  22. 2026-09-12 15:02 UTCEPSS rescore
  23. 2026-09-12 06:03 UTCEG score recompute
  24. 2026-09-12 06:03 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 69 more
  1. 2026-09-11 05:15 UTCEG score recompute
  2. 2026-09-11 05:15 UTCGHSA enrichment
  3. 2026-09-10 09:35 UTCEPSS rescore
  4. 2026-09-10 04:28 UTCGHSA enrichment
  5. 2026-09-09 03:41 UTCEG score recompute
  6. 2026-09-09 03:41 UTCGHSA enrichment
  7. 2026-09-08 22:01 UTCEPSS rescore
  8. 2026-09-07 16:11 UTCEG score recompute
  9. 2026-09-07 16:11 UTCGHSA enrichment
  10. 2026-09-06 15:03 UTCEG score recompute
  11. 2026-09-06 15:03 UTCGHSA enrichment
  12. 2026-09-06 13:48 UTCEPSS rescore
  13. 2026-09-05 14:13 UTCEG score recompute
  14. 2026-09-05 14:13 UTCGHSA enrichment
  15. 2026-09-04 13:10 UTCEG score recompute
  16. 2026-09-04 13:10 UTCGHSA enrichment
  17. 2026-09-04 05:07 UTCEPSS rescore
  18. 2026-09-03 12:14 UTCEG score recompute
  19. 2026-09-03 12:14 UTCGHSA enrichment
  20. 2026-09-02 14:12 UTCEPSS rescore
  21. 2026-09-02 10:38 UTCEG score recompute
  22. 2026-09-02 10:38 UTCGHSA enrichment
  23. 2026-09-01 13:54 UTCEPSS rescore
  24. 2026-09-01 09:48 UTCEG score recompute
  25. 2026-09-01 09:48 UTCGHSA enrichment
  26. 2026-09-01 04:40 UTCEPSS rescore
  27. 2026-09-01 04:40 UTCEPSS rescore
  28. 2026-08-31 07:28 UTCEG score recompute
  29. 2026-08-31 07:28 UTCGHSA enrichment
  30. 2026-08-30 19:18 UTCEPSS rescore
  31. 2026-08-30 19:17 UTCEPSS rescore
  32. 2026-08-30 06:25 UTCEG score recompute
  33. 2026-08-30 06:25 UTCGHSA enrichment
  34. 2026-08-30 01:22 UTCEPSS rescore
  35. 2026-08-29 05:38 UTCEG score recompute
  36. 2026-08-29 05:38 UTCGHSA enrichment
  37. 2026-08-28 21:42 UTCEPSS rescore
  38. 2026-08-27 19:29 UTCEG score recompute
  39. 2026-08-27 19:29 UTCGHSA enrichment
  40. 2026-08-27 14:25 UTCEPSS rescore
  41. 2026-08-26 18:42 UTCEG score recompute
  42. 2026-08-26 18:42 UTCGHSA enrichment
  43. 2026-08-26 14:47 UTCEPSS rescore
  44. 2026-08-25 17:54 UTCEG score recompute
  45. 2026-08-25 17:54 UTCGHSA enrichment
  46. 2026-08-25 13:49 UTCEPSS rescore
  47. 2026-08-24 17:08 UTCEG score recompute
  48. 2026-08-24 17:08 UTCGHSA enrichment
  49. 2026-08-24 14:18 UTCEPSS rescore
  50. 2026-08-23 15:27 UTCGHSA enrichment
  51. 2026-08-22 14:40 UTCEG score recompute
  52. 2026-08-22 14:40 UTCGHSA enrichment
  53. 2026-08-21 23:49 UTCEPSS rescore
  54. 2026-08-21 13:53 UTCEG score recompute
  55. 2026-08-21 13:53 UTCGHSA enrichment
  56. 2026-08-20 22:56 UTCEPSS rescore
  57. 2026-08-20 12:59 UTCEG score recompute
  58. 2026-08-20 12:59 UTCGHSA enrichment
  59. 2026-08-19 17:04 UTCEPSS rescore
  60. 2026-08-19 15:38 UTCGHSA enrichment
  61. 2026-08-18 14:51 UTCEG score recompute
  62. 2026-08-18 14:51 UTCGHSA enrichment
  63. 2026-08-18 13:50 UTCEG score recompute
  64. 2026-08-18 13:50 UTCGHSA enrichment
  65. 2026-08-18 13:49 UTCEPSS rescore
  66. 2026-08-18 13:49 UTCEPSS rescore
  67. 2026-08-17 16:22 UTCEG score recompute
  68. 2026-08-17 16:10 UTCEG score recompute
  69. 2026-08-17 16:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-74858?
CVE-2026-74858 is a medium vulnerability published on August 17, 2026. A vulnerability has been found in jae-jae fetcher-mcp up to 0.3.9. Impacted is the function fetchurl/fetchurls of the file /latest/meta-data/iam/security-credentials/ of the component URL Validation. Such manipulation leads to server-side request forgery. It is possible to launch the attack…
When was CVE-2026-74858 disclosed?
CVE-2026-74858 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-74858 actively exploited?
CVE-2026-74858 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 88.6% of all scored CVEs.
What is the CVSS score of CVE-2026-74858?
CVE-2026-74858 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-74858?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-74858, 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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