CVE-2026-49139

HIGHPre-NVD 7.07.0
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.0 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.4% (32nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from the CNA's CVSS
Sources: the CNA's CVSS, EPSS
Trending — 3 sources updated this week

Also known asEUVD-2026-33759 (ENISA EUVD) · GHSA-gv7x-pq3j-c5mj (GitHub Security Advisories)Source: ENISA EUVD

7.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 7.0Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the Microsoft Teams channel handler that allows remote attackers to exfiltrate Bot Framework bearer tokens by supplying a forged activity with an attacker-controlled serviceUrl value. Attackers can poison the stored conversation reference by sending a crafted inbound activity to the Teams webhook, causing subsequent bot replies to transmit token-bearing Authorization header requests to an attacker-controlled host.

CVSS v3
7.0
EG Score
7.0HIGHmedium confidence
EG Risk
32
EG Risk 32/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity70% × 45%
Impact severity (EG Severity): CVSS 7.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 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: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.0): severity, escalated by confirmed exploitation. This CVE's 7.0 is its impact severity (EG Severity), not escalated.

EG Severity
7.0 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.the CNA's CVSS · CVSS v3.0 or v3.1
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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

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

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.

The score's inputs: 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

June 1, 2026

Last Modified

July 28, 2026

Advisory Details (4)

Auto-updated Jun 11, 2026
Patch available. Sources: github_release, github_pr, github_commit.
Web page

Nanobot < 0.2.1 SSRF via Microsoft Teams Channel serviceUrl Poisoning | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nanobot-ssrf-via-microsoft-teams-channel-serviceurl-poisoning
GitHub commit Patch Available

commit 232df45126bc (HKUDS/nanobot)

Patch available: HKUDS/nanobot v0.2.1 (contains commit 232df45126bc)

https://github.com/HKUDS/nanobot/commit/232df45126bcf0f8fccd123d73714f202c8e8612
GitHub pull request Patch Available

[security] fix(msteams): trust service URLs before replies

Patch available: HKUDS/nanobot v0.2.1 (PR #4047 merged 2026-05-29)

https://github.com/HKUDS/nanobot/pull/4047
GitHub release Patch Available

v0.2.1

Patch available: HKUDS/nanobot v0.2.1

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

Vendor Advisories for CVE-2026-49139(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 9× 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 100 of 293 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 193 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  4. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-10-30 07:06 UTCEG score recompute
  6. 2026-10-30 07:06 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  7. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  8. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  9. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  11. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  12. 2026-10-25 14:23 UTCEG score recompute
  13. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  14. 2026-10-23 21:41 UTCEG score recompute
  15. 2026-10-23 21:41 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  16. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  17. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  18. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  19. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  20. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  21. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  22. 2026-10-18 03:34 UTCEG score recompute
  23. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  24. 2026-10-17 12:09 UTCEG score recompute
  25. 2026-10-17 12:08 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
Show 75 more
  1. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  3. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  6. 2026-10-12 16:00 UTCEG score recompute
  7. 2026-10-11 19:43 UTCEG score recompute
  8. 2026-10-11 16:57 UTCEG score recompute
  9. 2026-10-11 14:22 UTCEG score recompute
  10. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-10-03 13:39 UTCOSV refresh
  20. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  21. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  22. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  25. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  26. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  27. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  28. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  29. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  30. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  31. 2026-09-14 06:01 UTCEG score recompute
  32. 2026-09-14 06:01 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  33. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  34. 2026-09-13 00:06 UTCOSV refresh
  35. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  36. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  37. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  38. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  39. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  40. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  41. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  42. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  43. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  44. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  45. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  46. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  47. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  48. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 30th percentile
  49. 2026-08-25 03:51 UTCEG score recompute
  50. 2026-08-25 03:51 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  51. 2026-08-23 13:48 UTCEG score recompute
  52. 2026-08-23 13:48 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  53. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  54. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  55. 2026-08-21 14:49 UTCEG score recompute
  56. 2026-08-21 14:49 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  57. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  58. 2026-08-20 21:39 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  59. 2026-08-20 10:15 UTCEG score recompute
  60. 2026-08-20 10:15 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  61. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  62. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  63. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  64. 2026-08-17 04:41 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  65. 2026-08-16 15:00 UTCEG score recompute
  66. 2026-08-16 15:00 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  67. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  68. 2026-08-16 02:39 UTCEG score recompute
  69. 2026-08-16 02:39 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  70. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  71. 2026-08-15 15:16 UTCEG score recompute
  72. 2026-08-15 15:16 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  73. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  74. 2026-08-14 22:13 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH
  75. 2026-08-14 10:43 UTCGHSA enrichmentGHSA-gv7x-pq3j-c5mj · GitHub severity HIGH

Frequently asked(5)

What is CVE-2026-49139?
CVE-2026-49139 is a high-severity vulnerability; its CVE record was published on June 1, 2026. Nanobot prior to version 0.2.1 contains a server-side request forgery vulnerability in the Microsoft Teams channel handler that allows remote attackers to exfiltrate Bot Framework bearer tokens by supplying a forged activity with an attacker-controlled serviceUrl value. Attackers can poison the…
When was CVE-2026-49139 made public?
CVE-2026-49139 was made public on May 28, 2026: 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 June 1, 2026. EchelonGraph's copy of the record carries a last-modified date of July 28, 2026; the record at its source may have been updated since.
Is CVE-2026-49139 actively exploited?
CVE-2026-49139 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (32nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-49139?
CVE-2026-49139 has a CVSS base score of 7.0 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-49139?
A fix for CVE-2026-49139 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-49139 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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