CVE-2026-27690

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

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, ghsa, secondary
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

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
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: Track

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
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

July 14, 2026

Last Modified

September 8, 2026

Advisory Details (2)

Auto-updated Sep 15, 2026
No patch confirmed yet.
generic

SAP Security Notes & News

https://url.sap/sapsecuritypatchday
generic
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 rangeFixed inDependents
@sap/approuter—20.10.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 87× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 326 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-27690?
CVE-2026-27690 is a critical vulnerability 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 CVE-2026-27690 disclosed?
CVE-2026-27690 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27690 actively exploited?
CVE-2026-27690 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.0% of all scored CVEs.
What is the CVSS score of CVE-2026-27690?
CVE-2026-27690 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-27690?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27690, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-27690

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