CVE-2026-80350

HIGHPre-NVD 7.17.1
EchelonGraph scoreHIGH confidence

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

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. A secondary CVSS source baseline 7.1; 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
7.1EG
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: 0.4%CVSS: 7.1Exploit: No code on recordExposed services: Not assessed

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

The CVE record's CNA (VulnCheck) lists OneUptime versions before 12.0.7 as affected. No release containing a fix is confirmed on record.

OneUptime's webhook target check rejects private and loopback addresses given in IPv4 form and a small set of IPv6 forms, but has no case for the IPv4-mapped IPv6 range. The webhook delivery path calls SSRFProtection.validateWebhookTargetIsSafe, and the host-literal screening inside Common/Server/Utils/SSRFProtection.ts, performed by isBlockedHostnameLiteral, rejects private and loopback IPv4 ranges and tests an IPv6 value against the unspecified address, the loopback, the link-local prefix and the unique-local prefixes. A value such as [::ffff:127.0.0.1] matches none of them. The value is also recognised as an address literal rather than a name, so the path that re-checks addresses obtained from resolution is not taken. The HTTP client treats the mapped form as the embedded IPv4 address and connects to it, so an authenticated project member who can configure a webhook can direct the server at loopback services, private network ranges and link-local metadata endpoints, and the response is recorded where the webhook result can be read. Version 12.0.7 adds handling for the mapped range.

CVSS v3
7.1
EG Score
7.1HIGHhigh confidence
EG Risk
48
EG Risk 48/100

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)
Severity71% × 45%
The EG Score, 7.1 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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
32nd
KEV
Not listed

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

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

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

August 26, 2026

Last Modified

September 16, 2026

Advisory Details (5)

Auto-updated Aug 26, 2026
No fix on record yet. Sources: github.
Web page

OneUptime before 12.0.7 Server-Side Request Forgery via IPv4-Mapped IPv6 Webhook URL | Advisories | VulnCheck

https://www.vulncheck.com/advisories/oneuptime-before-12.0.7-server-side-request-forgery-via-ipv4-mapped-ipv6-webhook-url
Web page

oneuptime/Common/Server/Utils/SSRFProtection.ts at 12.0.6 · OneUptime/oneuptime · GitHub

https://github.com/OneUptime/oneuptime/blob/12.0.6/Common/Server/Utils/SSRFProtection.ts
Web page

SSRF via IPv4-Mapped IPv6 Bypass in Webhook URL Validation · Issue #2578 · OneUptime/oneuptime · GitHub

https://github.com/OneUptime/oneuptime/issues/2578
GitHub advisoryMentions a patch (unverified)

SSRF via IPv4-Mapped IPv6 Bypass in Webhook URL Validation · Advisory · OneUptime/oneuptime · GitHub

https://github.com/OneUptime/oneuptime/security/advisories/GHSA-9g3w-r349-3vvw
Web page

GitHub - OneUptime/oneuptime: Complete open-source monitoring and observability platform. · GitHub

https://github.com/OneUptime/oneuptime

Vendor Advisories for CVE-2026-80350(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 19× in last 7d / 98× 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 99 of 133 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 34 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  2. 2026-10-13 06:30 UTCEG score recompute
  3. 2026-10-13 06:30 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  4. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-10-12 14:57 UTCEG score recompute
  6. 2026-10-11 19:21 UTCEG score recompute
  7. 2026-10-11 16:37 UTCEG score recompute
  8. 2026-10-11 13:56 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-10 06:49 UTCEG score recompute
  12. 2026-10-10 06:49 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  13. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-09 03:28 UTCEG score recompute
  15. 2026-10-09 03:28 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  16. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  17. 2026-10-08 01:59 UTCEG score recompute
  18. 2026-10-08 01:59 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  19. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  20. 2026-10-07 09:55 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  21. 2026-10-06 21:13 UTCEG score recompute
  22. 2026-10-06 21:13 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  23. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  24. 2026-10-06 08:52 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  25. 2026-10-05 20:29 UTCEG score recompute
Show 74 more
  1. 2026-10-05 20:29 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  2. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-10-05 08:05 UTCEG score recompute
  4. 2026-10-05 08:05 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  5. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  6. 2026-10-04 19:43 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  7. 2026-10-04 04:35 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  8. 2026-10-03 16:13 UTCEG score recompute
  9. 2026-10-03 16:13 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  10. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-10-02 21:31 UTCEG score recompute
  12. 2026-10-02 21:31 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  13. 2026-10-02 17:57 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  14. 2026-10-02 09:08 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  15. 2026-10-01 20:46 UTCEG score recompute
  16. 2026-10-01 20:46 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  18. 2026-10-01 08:24 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  19. 2026-09-30 19:59 UTCEG score recompute
  20. 2026-09-30 19:59 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  21. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  22. 2026-09-30 06:10 UTCEG score recompute
  23. 2026-09-30 06:10 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  24. 2026-09-29 12:32 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  25. 2026-09-28 23:14 UTCEG score recompute
  26. 2026-09-28 23:14 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  27. 2026-09-28 10:45 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  28. 2026-09-27 22:16 UTCEG score recompute
  29. 2026-09-27 22:16 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  30. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  31. 2026-09-27 09:33 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  32. 2026-09-26 21:11 UTCEG score recompute
  33. 2026-09-26 21:10 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  34. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  35. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  36. 2026-09-25 11:45 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  37. 2026-09-24 22:11 UTCEG score recompute
  38. 2026-09-24 22:11 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  39. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  40. 2026-09-24 08:17 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  41. 2026-09-23 19:55 UTCEG score recompute
  42. 2026-09-23 19:55 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  43. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  44. 2026-09-23 07:08 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  45. 2026-09-22 18:47 UTCEG score recompute
  46. 2026-09-22 18:46 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  47. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  48. 2026-09-22 06:14 UTCEG score recompute
  49. 2026-09-22 06:14 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  50. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  51. 2026-09-21 17:52 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  52. 2026-09-21 05:30 UTCEG score recompute
  53. 2026-09-21 05:30 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  54. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  55. 2026-09-20 16:52 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  56. 2026-09-20 04:25 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  57. 2026-09-19 16:03 UTCEG score recompute
  58. 2026-09-19 16:03 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  59. 2026-09-19 03:39 UTCEG score recompute
  60. 2026-09-19 03:39 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  61. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  62. 2026-09-18 15:17 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  63. 2026-09-18 02:55 UTCEG score recompute
  64. 2026-09-18 02:55 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  65. 2026-09-17 14:33 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  66. 2026-09-17 02:08 UTCEG score recompute
  67. 2026-09-17 02:08 UTCGHSA enrichmentGHSA-7f26-9454-6r96 · GitHub severity HIGH · GitHub CVSS 7.1
  68. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  69. 2026-09-16 13:46 UTCEG score recompute
  70. 2026-09-16 09:19 UTCEG score recompute
  71. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  72. 2026-09-15 07:16 UTCEG score recompute
  73. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  74. 2026-09-13 16:49 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-80350?
CVE-2026-80350 is a high-severity vulnerability; its CVE record was published on August 26, 2026. OneUptime's webhook target check rejects private and loopback addresses given in IPv4 form and a small set of IPv6 forms, but has no case for the IPv4-mapped IPv6 range. The webhook delivery path calls SSRFProtection.validateWebhookTargetIsSafe, and the host-literal screening inside…
When was CVE-2026-80350 made public?
CVE-2026-80350 was made public on August 26, 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 August 26, 2026. EchelonGraph's copy of the record carries a last-modified date of September 16, 2026; the record at its source may have been updated since.
Is CVE-2026-80350 actively exploited?
CVE-2026-80350 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-2026-80350?
CVE-2026-80350 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-80350?
No fix for CVE-2026-80350 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (VulnCheck) lists OneUptime versions before 12.0.7 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-80350 are linked in the Vendor Advisories panel on this page.

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