CVE-2026-65056

HIGHPre-NVD 8.28.2
EchelonGraph scoreMEDIUM confidence

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

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-07-21. A secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated

Also known asEUVD-2026-46421 (ENISA EUVD) · GHSA-r9hf-v7rm-5h4j (GitHub Security Advisories)Source: ENISA EUVD

8.2EG
EchelonGraph verdictPlan mitigationRemediate 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: 0.3%CVSS: 8.2Exploit: No code on recordExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

mcp-webresearch 0.1.7 contains a server-side request forgery vulnerability that allows attackers to access internal network services by supplying loopback, link-local, or cloud metadata addresses to the visit_page tool, which only validates the URL protocol without filtering private or reserved IP ranges. Attackers can steer the LLM-controlled URL argument through prompt injection to navigate the server's Playwright browser to internal endpoints such as cloud instance metadata services, causing the server to return sensitive internal page content including credentials into the model context.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
53
EG Risk 53/100

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)
Severity82% × 45%
Impact severity (EG Severity): CVSS 8.2 of 10. Never the KEV-floored or EPSS-lifted EG Score.
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 referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.
EPSS PROB
0.3%
EPSS %ILE
21st
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 (8.2): severity, escalated by confirmed exploitation. This CVE's 8.2 is its impact severity (EG Severity), not escalated.

EG Severity
8.2 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS. 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 low or medium mission impact; Track* at high (mission-essential systems).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: the SSVC and BOD 26-04 blocks below.

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

A fix is referenced, but no release containing it is confirmed. Check the referenced fix and the vendor's advisory for a release that contains it and apply that within your standard update timelines; until then, restrict network exposure of the affected system or apply the vendor's mitigation.

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 21, 2026

Last Modified

October 24, 2026

Advisory Details (2)

Auto-updated Jul 21, 2026
Fix referenced — no release confirmed yet.
Web page

mcp-webresearch Server-Side Request Forgery in visit_page Due to Missing Internal-IP Filtering | Advisories | VulnCheck

https://www.vulncheck.com/advisories/mcp-webresearch-server-side-request-forgery-in-visit-page-due-to-missing-internal-ip-filtering
Web page

oss/mcp-webresearch.md at main · geo-chen/oss · GitHub

https://github.com/geo-chen/oss/blob/main/mcp-webresearch.md

Vendor Advisories for CVE-2026-65056(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 / 47× 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 258 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 158 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-10-25 14:12 UTCEG score recompute
  5. 2026-10-24 19:26 UTCEG score recompute
  6. 2026-10-24 19:26 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  7. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  10. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  11. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  12. 2026-10-20 09:11 UTCEG score recompute
  13. 2026-10-20 09:11 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  14. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  16. 2026-10-18 03:21 UTCEG score recompute
  17. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  21. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  22. 2026-10-13 11:21 UTCEG score recompute
  23. 2026-10-13 11:21 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  25. 2026-10-12 15:47 UTCEG score recompute
Show 75 more
  1. 2026-10-11 19:32 UTCEG score recompute
  2. 2026-10-11 16:47 UTCEG score recompute
  3. 2026-10-11 14:08 UTCEG score recompute
  4. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  7. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-10-04 14:46 UTCEG score recompute
  13. 2026-10-04 14:46 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  14. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  15. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  16. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-01 07:26 UTCEG score recompute
  18. 2026-10-01 07:26 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  21. 2026-09-28 06:04 UTCEG score recompute
  22. 2026-09-28 06:04 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  23. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-09-24 15:01 UTCEG score recompute
  25. 2026-09-24 15:01 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  26. 2026-09-24 03:21 UTCEG score recompute
  27. 2026-09-24 03:21 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  28. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  29. 2026-09-23 01:23 UTCEG score recompute
  30. 2026-09-23 01:23 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  31. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  32. 2026-09-20 05:55 UTCEG score recompute
  33. 2026-09-20 05:55 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  34. 2026-09-19 00:19 UTCEG score recompute
  35. 2026-09-19 00:19 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  36. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  37. 2026-09-18 03:47 UTCEG score recompute
  38. 2026-09-18 03:47 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  39. 2026-09-17 05:05 UTCEG score recompute
  40. 2026-09-17 05:05 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  41. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  42. 2026-09-16 12:35 UTCEG score recompute
  43. 2026-09-16 12:35 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  44. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  45. 2026-09-14 03:36 UTCEG score recompute
  46. 2026-09-14 03:36 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  47. 2026-09-13 16:44 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  48. 2026-09-13 05:51 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  49. 2026-09-12 18:58 UTCEG score recompute
  50. 2026-09-12 18:58 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  51. 2026-09-12 07:24 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  52. 2026-09-11 20:31 UTCEG score recompute
  53. 2026-09-11 20:31 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  54. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  55. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  56. 2026-09-11 08:56 UTCEG score recompute
  57. 2026-09-11 08:56 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  58. 2026-09-09 11:13 UTCEG score recompute
  59. 2026-09-09 11:13 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  60. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  61. 2026-09-07 22:30 UTCEG score recompute
  62. 2026-09-07 22:30 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  63. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  64. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  65. 2026-09-06 10:41 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  66. 2026-09-05 19:50 UTCEG score recompute
  67. 2026-09-05 19:50 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  68. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  69. 2026-09-05 08:28 UTCEG score recompute
  70. 2026-09-05 08:28 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  71. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  72. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  73. 2026-09-02 00:55 UTCEG score recompute
  74. 2026-09-02 00:55 UTCGHSA enrichmentGHSA-r9hf-v7rm-5h4j · GitHub severity HIGH · GitHub CVSS 8.2
  75. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 33rd percentile

Frequently asked(5)

What is CVE-2026-65056?
CVE-2026-65056 is a high-severity vulnerability; its CVE record was published on July 21, 2026. mcp-webresearch 0.1.7 contains a server-side request forgery vulnerability that allows attackers to access internal network services by supplying loopback, link-local, or cloud metadata addresses to the visit_page tool, which only validates the URL protocol without filtering private or reserved IP…
When was CVE-2026-65056 made public?
CVE-2026-65056 was made public on July 21, 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 July 21, 2026. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-65056 actively exploited?
CVE-2026-65056 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-65056?
CVE-2026-65056 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-65056?
A fix for CVE-2026-65056 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2026-65056 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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