CVE-2026-41683

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 75% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.6Exploit: NoneExposed: 0

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

i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Prior to version 3.9.3, i18next-http-middleware wrote user-controlled language values into the Content-Language response header after passing them through utils.escape(), which is an HTML-entity encoder that does not strip carriage return, line feed, or other control characters. When the application used an older i18next (< 19.5.0) that still exercised the backward-compatibility fallback at LanguageDetector.js:100 or otherwise produced a raw detected value, CRLF sequences in the attacker-controlled lng parameter reached res.setHeader('Content-Language', ...) verbatim. This issue has been patched in version 3.9.3.

CVSS v3
8.6
EG Score
8.6(medium)
EPSS
24.7%
KEV
Not listed

Published

May 8, 2026

Last Modified

May 12, 2026

Advisory Details (1)

Auto-updated May 8, 2026
Patch available. Sources: github.
github Patch Available

HTTP response splitting and DoS in i18next-http-middleware via unsanitised Content-Language header · Advisory · i18next/i18next-http-middleware · GitHub

https://github.com/i18next/i18next-http-middleware/security/advisories/GHSA-c3h8-g69v-pjrg

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
i18next-http-middleware—3.9.3—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 45× 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 108 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-41683?
CVE-2026-41683 is a high vulnerability published on May 8, 2026. i18next-http-middleware is a middleware to be used with Node.js web frameworks like express or Fastify and also for Deno. Prior to version 3.9.3, i18next-http-middleware wrote user-controlled language values into the Content-Language response header after passing them through utils.escape(), which…
When was CVE-2026-41683 disclosed?
CVE-2026-41683 was first published in the National Vulnerability Database on May 8, 2026, with the most recent update on May 12, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41683 actively exploited?
CVE-2026-41683 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41683?
CVE-2026-41683 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-41683?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41683, 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-2026-41683

Explore →

Is Your Infrastructure Affected by CVE-2026-41683?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs