CVE-2026-103592

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory published 2026-10-01. A secondary CVSS source baseline 6.5; 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 week

Also known asEUVD-2026-90440 (ENISA EUVD) · GHSA-73j7-rxg8-5ccm (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
EchelonGraph verdictMonitorNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 6.5Exploit: None knownExposed 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 pecee simple-router versions up to and including 5.4.1.7 as affected. No release containing a fix is confirmed on record.

simple-php-router through 5.4.1.7 contains an IP restriction bypass vulnerability in the IpRestrictAccess middleware that allows remote unauthenticated attackers to bypass IP whitelist and blacklist protections. Attackers can spoof X-Forwarded-For, CF-Connecting-IP, or Client-IP headers to impersonate whitelisted addresses or evade blacklists, gaining access to IP-restricted routes.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

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)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
0.2%
EPSS %ILE
7th
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 (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-30). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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.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; Attend at high (mission-essential systems).

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days 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.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (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 30, 2026

Last Modified

October 6, 2026

Advisory Details (5)

Auto-updated Sep 30, 2026
No fix on record yet.
Web page

simple-php-router through 5.4.1.7 IP restriction bypass via forwarding headers | Advisories | VulnCheck

https://www.vulncheck.com/advisories/simple-php-router-through-5.4.1.7-ip-restriction-bypass-via-forwarding-headers
Web page

Security vulnerabilities: IP access bypass and JSON input crash · Issue #727 · skipperbent/simple-php-router · GitHub

https://github.com/skipperbent/simple-php-router/issues/727
Web page

simple-php-router/src/Pecee/Http/Request.php at 5.4.1.7 · skipperbent/simple-php-router · GitHub

https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Request.php
Web page

simple-php-router/src/Pecee/Http/Middleware/IpRestrictAccess.php at 5.4.1.7 · skipperbent/simple-php-router · GitHub

https://github.com/skipperbent/simple-php-router/blob/5.4.1.7/src/Pecee/Http/Middleware/IpRestrictAccess.php
Web page

GitHub - skipperbent/simple-php-router: Simple, fast and yet powerful PHP router that is easy to get integrated and in any project. Heavily inspired by the way Laravel handles routing, with both simplicity and expand-ability in mind. · GitHub

https://github.com/skipperbent/simple-php-router

Vendor Advisories for CVE-2026-103592(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 11× in last 7d / 60× 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.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-31 00:34 UTCEG score recompute
  4. 2026-10-31 00:34 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  5. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  7. 2026-10-29 14:51 UTCEG score recompute
  8. 2026-10-29 14:51 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  9. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-25 14:56 UTCEG score recompute
  14. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-23 09:19 UTCEG score recompute
  17. 2026-10-23 09:19 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  18. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  23. 2026-10-18 05:09 UTCEG score recompute
  24. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.2% · 7th percentile
Show 42 more
  1. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-12 16:40 UTCEG score recompute
  5. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-10-11 20:15 UTCEG score recompute
  7. 2026-10-11 18:28 UTCEG score recompute
  8. 2026-10-11 15:01 UTCEG score recompute
  9. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-11 09:44 UTCEG score recompute
  11. 2026-10-11 09:44 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  12. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-10 07:54 UTCEG score recompute
  14. 2026-10-10 07:53 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  15. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-09 06:01 UTCEG score recompute
  17. 2026-10-09 06:01 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  18. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-10-08 04:09 UTCEG score recompute
  20. 2026-10-08 04:09 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  21. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-10-07 02:17 UTCEG score recompute
  23. 2026-10-07 02:17 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  24. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  25. 2026-10-06 00:26 UTCEG score recompute
  26. 2026-10-06 00:26 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  27. 2026-10-05 23:56 UTCEG score recompute
  28. 2026-10-05 23:56 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  29. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  30. 2026-10-05 09:59 UTCEG score recompute
  31. 2026-10-05 09:59 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  32. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  33. 2026-10-04 08:09 UTCEG score recompute
  34. 2026-10-04 08:09 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  35. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  36. 2026-10-03 06:18 UTCEG score recompute
  37. 2026-10-03 06:18 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  38. 2026-10-02 04:26 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  39. 2026-10-01 02:34 UTCEG score recompute
  40. 2026-10-01 02:34 UTCGHSA enrichmentGHSA-73j7-rxg8-5ccm · GitHub CVSS 6.5
  41. 2026-09-30 23:18 UTCEG score recomputeFirst assessed: 6.5 MEDIUM
  42. 2026-09-30 23:15 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-103592?
CVE-2026-103592 is a medium-severity vulnerability; its CVE record was published on September 30, 2026. simple-php-router through 5.4.1.7 contains an IP restriction bypass vulnerability in the IpRestrictAccess middleware that allows remote unauthenticated attackers to bypass IP whitelist and blacklist protections. Attackers can spoof X-Forwarded-For, CF-Connecting-IP, or Client-IP headers to…
When was CVE-2026-103592 made public?
CVE-2026-103592 was made public on September 30, 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 30, 2026. EchelonGraph's copy of the record carries a last-modified date of October 6, 2026; the record at its source may have been updated since.
Is CVE-2026-103592 actively exploited?
CVE-2026-103592 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-103592?
CVE-2026-103592 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-103592?
No fix for CVE-2026-103592 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 pecee simple-router versions up to and including 5.4.1.7 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-103592 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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