CVE-2026-49138

MEDIUMPre-NVD 5.05.0—
EchelonGraph scoreMEDIUM confidence

Score 5.0 from GitHub Security Advisory published 2026-06-01. a secondary CVSS source baseline 5.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.0EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.0Exploit: Elevated riskExposed: 0

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

Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the web_fetch tool that allows remote attackers to reach internal or private network hosts by supplying a URL that redirects to a loopback or private address via a 3xx Location header. Attackers can exploit the automatic HTTP redirect following behavior in the httpx library to bypass initial URL validation and cause the runtime to send outbound requests to internal hosts before final resolved URL validation is applied.

CVSS v3
5.0
EG Score
5.0(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: 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
Severity50% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

June 1, 2026

Last Modified

July 22, 2026

Advisory Details (4)

Auto-updated Jun 14, 2026
Patch available. Sources: github_commit, github_pr, github_release.
github_pr Patch Available

[security] fix(web): validate redirect targets before fetching

Patch available: HKUDS/nanobot v0.2.1 (PR #3928 merged 2026-05-22)

https://github.com/HKUDS/nanobot/pull/3928
generic

Nanobot < 0.2.1 SSRF via web_fetch Tool Redirect Following | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nanobot-ssrf-via-web-fetch-tool-redirect-following
github_release Patch Available

v0.2.1

Patch available: HKUDS/nanobot v0.2.1

https://github.com/HKUDS/nanobot/releases/tag/v0.2.1
github_commit Patch Available

commit 545294c62c09 (HKUDS/nanobot)

Patch available: HKUDS/nanobot v0.2.1 (contains commit 545294c62c09)

https://github.com/HKUDS/nanobot/commit/545294c62c0947da40eb5b65288aaf02b5fdf632

Vendor Advisories for CVE-2026-49138(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 10× in last 7d / 44× 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 104 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-49138?
CVE-2026-49138 is a medium vulnerability published on June 1, 2026. Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the web_fetch tool that allows remote attackers to reach internal or private network hosts by supplying a URL that redirects to a loopback or private address via a 3xx Location header. Attackers can exploit the…
When was CVE-2026-49138 disclosed?
CVE-2026-49138 was first published in the National Vulnerability Database on June 1, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49138 actively exploited?
CVE-2026-49138 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 79.1% of all scored CVEs.
What is the CVSS score of CVE-2026-49138?
CVE-2026-49138 has a CVSS v3 base score of 5.0 (NVD).
How do I remediate CVE-2026-49138?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49138, 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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