CVE-2026-93869

MEDIUMPre-NVD 6.16.1
EchelonGraph scoreMEDIUM confidence

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

Score 6.1 from GitHub Security Advisory published 2026-09-18. The CNA's CVSS baseline 6.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Elevated

Also known asEUVD-2026-83366 (ENISA EUVD) · GHSA-5p43-vwpq-wm4q (GitHub Security Advisories)Source: ENISA EUVD

6.1EG
EchelonGraph verdictPlan mitigationNo release containing the referenced fix is confirmed: check the referenced fix and the vendor's advisory for a release that contains it; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule (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: 6.1Exploit: 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).

Cotonti through 1.0.0 contains an open redirect vulnerability in the cot_url_check() function that validates redirect destinations using a regular expression lacking an end-of-string anchor. Attackers can bypass the redirect guard by supplying hostnames beginning with the site domain to redirect users to attacker-controlled hosts through the ratings plugin or other redirect callers.

CVSS v3
6.1
EG Score
6.1MEDIUMmedium confidence
EG Risk
43
EG Risk 43/100

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)
Severity61% × 45%
Impact severity (EG Severity): CVSS 6.1 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; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.
EPSS PROB
0.4%
EPSS %ILE
29th
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 (6.1): severity, escalated by confirmed exploitation. This CVE's 6.1 is its impact severity (EG Severity), not escalated.

EG Severity
6.1 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). 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.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.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 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; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule.

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.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says. In the directive's words, “Fix on system upgrade” means that, “unless conditions change”, the vulnerability “should be remediated the next time the vulnerable asset receives a scheduled major upgrade or rebuild”: its timelines are “dynamic as facts change”, and a KEV listing shortens them.

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

September 18, 2026

Last Modified

September 24, 2026

Advisory Details (6)

Auto-updated Sep 18, 2026
Fix referenced — no release confirmed yet. Sources: github_pr.
Web page

Cotonti through 1.0.0 Open Redirect via Unanchored cot_url_check() Regex | Advisories | VulnCheck

https://www.vulncheck.com/advisories/cotonti-through-1.0.0-open-redirect-via-unanchored-cot-url-check-regex
Web page

GitHub - Cotonti/Cotonti: Fast, reliable and flexible PHP CMF/CMS · GitHub

https://github.com/Cotonti/Cotonti
Web page

Cotonti/plugins/ratings/ratings.ajax.php at 1.0.0 · Cotonti/Cotonti · GitHub

https://github.com/Cotonti/Cotonti/blob/1.0.0/plugins/ratings/ratings.ajax.php
Web page

Cotonti/system/functions.php at 1.0.0 · Cotonti/Cotonti · GitHub

https://github.com/Cotonti/Cotonti/blob/1.0.0/system/functions.php
GitHub pull request

security: add end-anchor to cot_url_check() regex to prevent subdomain spoof (CWE-601)

Upstream fix in progress (PR #1899 · Cotonti/Cotonti, state=open)

https://github.com/Cotonti/Cotonti/pull/1899
Web page

[Security] cot_url_check() regex missing end-anchor allows subdomain spoofing open redirect (CWE-601) · Issue #1891 · Cotonti/Cotonti · GitHub

https://github.com/Cotonti/Cotonti/issues/1891

Vendor Advisories for CVE-2026-93869(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 8× in last 7d / 52× 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.

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 98 is merged into the row it repeats.

  1. 2026-11-01 16:36 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  2. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  3. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  4. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  5. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  6. 2026-10-28 07:25 UTCOSV refresh
  7. 2026-10-27 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  8. 2026-10-26 16:33 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  9. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.4% · 29th percentile
  10. 2026-10-25 13:49 UTCEG score recompute
  11. 2026-10-24 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  12. 2026-10-23 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  13. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  14. 2026-10-21 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  15. 2026-10-20 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  16. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  17. 2026-10-18 22:01 UTCEG score recompute
  18. 2026-10-18 22:00 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  19. 2026-10-18 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  20. 2026-10-18 02:58 UTCEG score recompute
  21. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  22. 2026-10-16 16:45 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  23. 2026-10-15 16:33 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  24. 2026-10-14 16:34 UTCEPSS rescoreEPSS 0.4% · 28th percentile
  25. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.4% · 28th percentile
Show 72 more
  1. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  2. 2026-10-12 14:42 UTCEG score recompute
  3. 2026-10-11 19:12 UTCEG score recompute
  4. 2026-10-11 18:33 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  5. 2026-10-11 16:28 UTCEG score recompute
  6. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  7. 2026-10-11 13:41 UTCEG score recompute
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  9. 2026-10-10 17:45 UTCEG score recompute
  10. 2026-10-10 17:45 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  11. 2026-10-09 20:08 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  12. 2026-10-09 17:51 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  13. 2026-10-08 17:24 UTCEG score recompute
  14. 2026-10-08 17:24 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  15. 2026-10-08 17:14 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  16. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  17. 2026-10-07 13:36 UTCEG score recompute
  18. 2026-10-07 13:36 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  19. 2026-10-06 15:19 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  20. 2026-10-06 13:31 UTCEG score recompute
  21. 2026-10-06 13:31 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  22. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  23. 2026-10-05 13:38 UTCEG score recompute
  24. 2026-10-05 13:38 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  25. 2026-10-04 23:23 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  26. 2026-10-04 13:45 UTCEG score recompute
  27. 2026-10-04 13:45 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  28. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  29. 2026-10-03 13:52 UTCEG score recompute
  30. 2026-10-03 13:52 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  31. 2026-10-02 13:54 UTCEG score recompute
  32. 2026-10-02 13:54 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  33. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  34. 2026-10-01 14:00 UTCEG score recompute
  35. 2026-10-01 14:00 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  36. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  37. 2026-09-30 14:07 UTCEG score recompute
  38. 2026-09-30 14:07 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  39. 2026-09-29 14:15 UTCEG score recompute
  40. 2026-09-29 14:15 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  41. 2026-09-28 14:23 UTCEG score recompute
  42. 2026-09-28 14:23 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  43. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  44. 2026-09-27 14:30 UTCEG score recompute
  45. 2026-09-27 14:30 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  46. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  47. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  48. 2026-09-26 14:37 UTCEG score recompute
  49. 2026-09-26 14:37 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  50. 2026-09-25 14:44 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  51. 2026-09-24 14:51 UTCEG score recompute
  52. 2026-09-24 14:51 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  53. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 27th percentile
  54. 2026-09-23 20:46 UTCEG score recompute
  55. 2026-09-23 20:46 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  56. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  57. 2026-09-22 20:54 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  58. 2026-09-22 16:27 UTCEG score recompute
  59. 2026-09-22 16:27 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  60. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  61. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  62. 2026-09-21 16:26 UTCEG score recompute
  63. 2026-09-21 16:26 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  64. 2026-09-21 15:30 UTCEG score recompute
  65. 2026-09-21 15:30 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  66. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  67. 2026-09-20 20:15 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  68. 2026-09-19 20:22 UTCEG score recompute
  69. 2026-09-19 20:22 UTCGHSA enrichmentGHSA-5p43-vwpq-wm4q · GitHub CVSS 6.1
  70. 2026-09-18 20:30 UTCEG score recompute
  71. 2026-09-18 19:59 UTCEG score recomputeFirst assessed: 6.1 MEDIUM
  72. 2026-09-18 19:59 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-93869?
CVE-2026-93869 is a medium-severity vulnerability; its CVE record was published on September 18, 2026. Cotonti through 1.0.0 contains an open redirect vulnerability in the cot_url_check() function that validates redirect destinations using a regular expression lacking an end-of-string anchor. Attackers can bypass the redirect guard by supplying hostnames beginning with the site domain to redirect…
When was CVE-2026-93869 made public?
CVE-2026-93869 was made public on September 17, 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 September 18, 2026. EchelonGraph's copy of the record carries a last-modified date of September 24, 2026; the record at its source may have been updated since.
Is CVE-2026-93869 actively exploited?
CVE-2026-93869 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (29th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-93869?
CVE-2026-93869 has a CVSS base score of 6.1 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-93869?
A fix for CVE-2026-93869 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-2026-93869 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-93869

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