CVE-2026-27690

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

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

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-14. A secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
9.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Due to an HTTP Request Smuggling vulnerability in SAP Approuter, an unauthenticated attacker could send a specially crafted HTTP request that leads to request-response desynchronization. This could result in the exposure of user responses and cause the system to become unavailable. This leads to a high impact on confidentiality and availability.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100

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)
Severity91% × 45%
The EG Score, 9.1 of 10.
Exploitation0.7% × 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 total (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
51st
KEV
Not listed

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

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (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)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (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 14, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
Patch available.
Web page

SAP Security Notes & News

https://url.sap/sapsecuritypatchday
Web page
https://me.sap.com/notes/3720138

Vendor Advisories for CVE-2026-27690(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFix by version rangeDependents
@sap/approuter—
  • every version up to 20.10.0: fixed in 20.10.0
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 32× 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 97 of 351 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 254 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 12:51 UTCEG score recompute
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  3. 2026-10-13 10:50 UTCEG score recompute
  4. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  5. 2026-10-12 16:17 UTCEG score recompute
  6. 2026-10-11 19:59 UTCEG score recompute
  7. 2026-10-11 17:13 UTCEG score recompute
  8. 2026-10-11 14:44 UTCEG score recompute
  9. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  12. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  13. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  16. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  18. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-10-01 13:39 UTCEG score recompute
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  22. 2026-09-28 09:25 UTCEG score recompute
  23. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  24. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  25. 2026-09-24 09:57 UTCEG score recompute
Show 72 more
  1. 2026-09-23 04:15 UTCEG score recompute
  2. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  3. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  4. 2026-09-18 04:59 UTCEG score recompute
  5. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  6. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  7. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  8. 2026-09-13 23:30 UTCEG score recompute
  9. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  10. 2026-09-13 07:57 UTCEG score recompute
  11. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  12. 2026-09-12 01:48 UTCEG score recompute
  13. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  14. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  15. 2026-09-08 22:52 UTCEG score recompute
  16. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  17. 2026-09-08 01:51 UTCEG score recompute
  18. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  19. 2026-09-06 13:47 UTCEG score recompute
  20. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  21. 2026-09-05 21:22 UTCEG score recompute
  22. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  23. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  24. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  25. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  26. 2026-08-31 05:54 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  27. 2026-08-31 00:19 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  28. 2026-08-30 20:21 UTCEG score recompute
  29. 2026-08-30 20:21 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  30. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  31. 2026-08-30 16:24 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  32. 2026-08-30 10:59 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  33. 2026-08-30 05:27 UTCEG score recompute
  34. 2026-08-30 05:27 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  35. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  36. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  37. 2026-08-28 02:30 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  38. 2026-08-27 21:34 UTCEG score recompute
  39. 2026-08-27 21:34 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  40. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  41. 2026-08-27 13:55 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  42. 2026-08-27 05:09 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  43. 2026-08-27 00:04 UTCEG score recompute
  44. 2026-08-27 00:04 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  45. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  46. 2026-08-26 12:49 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  47. 2026-08-26 07:34 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  48. 2026-08-26 02:05 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  49. 2026-08-25 15:50 UTCEG score recompute
  50. 2026-08-25 15:50 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  51. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  52. 2026-08-25 11:50 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  53. 2026-08-25 07:50 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  54. 2026-08-25 03:52 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  55. 2026-08-24 23:54 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  56. 2026-08-24 19:56 UTCEG score recompute
  57. 2026-08-24 19:56 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  58. 2026-08-24 12:36 UTCEG score recompute
  59. 2026-08-24 12:36 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  60. 2026-08-24 08:11 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  61. 2026-08-24 03:49 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  62. 2026-08-23 22:26 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  63. 2026-08-23 18:28 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  64. 2026-08-23 14:30 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  65. 2026-08-23 10:32 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  66. 2026-08-23 06:34 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  67. 2026-08-23 02:36 UTCEG score recompute
  68. 2026-08-23 02:36 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  69. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.7% · 49th percentile
  70. 2026-08-22 22:37 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  71. 2026-08-22 18:38 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1
  72. 2026-08-22 14:40 UTCGHSA enrichmentGHSA-8m85-wqg7-c529 · GitHub severity CRITICAL · GitHub CVSS 9.1

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-27690?
CVE-2026-27690 is a critical-severity vulnerability; its CVE record was published on July 14, 2026. Due to an HTTP Request Smuggling vulnerability in SAP Approuter, an unauthenticated attacker could send a specially crafted HTTP request that leads to request-response desynchronization. This could result in the exposure of user responses and cause the system to become unavailable. This leads to a…
When was the CVE record for CVE-2026-27690 published?
The CVE record for CVE-2026-27690 was published on July 14, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-27690 actively exploited?
CVE-2026-27690 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-27690?
CVE-2026-27690 has a CVSS base score of 9.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-27690?
A fix for CVE-2026-27690 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-27690 are linked in the Vendor Advisories panel on this page.

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