CVE-2026-59083

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-14. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

A fix is available — apply it.

Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations.

This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.0.M1 through 9.0.119, from 8.5.0 through 8.5.100. Other versions that have reached end of support may also be affected.

Users are recommended to upgrade to version 11.0.24, 10.1.57 or 9.0.120, which fix the issue.

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%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

July 14, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Aug 30, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-59083: Apache Tomcat: Incorrect URL decoding in RewriteValve may allow security control bypass

http://www.openwall.com/lists/oss-security/2026/07/14/7
generic
https://lists.apache.org/thread/3g63zos2gkjo5vgnrk8kxmosv47w6wbq

Vendor Advisories for CVE-2026-59083(5)

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

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatjws7-tomcat-0:11.0.21-6.redhat_00005.1.el9jws2026-08-05redhat
redhatpatch2026-08-05redhat
redhattomcat10-main-10.1.57-1.hum12026-07-10redhat
redhattomcat11-main-11.0.24-0.1.hum12026-07-08redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(9 across 4 ecosystems)
Debian:13(3)
PackageVulnerable rangeFixed inDependents
tomcat1010.1.40-1 ... 10.1.55-1~deb13u1 (10 versions)——
tomcat1111.0.11-1 ... 11.0.6-1 (10 versions)——
tomcat9—9.0.70-2—
Debian:14(3)
PackageVulnerable rangeFixed inDependents
tomcat1010.1.40-1 ... 10.1.55-1~deb13u1 (10 versions)——
tomcat1111.0.11-1 ... 11.0.6-1 (9 versions)11.0.24-1—
tomcat9—9.0.70-2—
Debian:12(2)
PackageVulnerable rangeFixed inDependents
tomcat1010.1.10-1 ... 10.1.9-1 (36 versions)——
tomcat9—9.0.70-2—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
tomcat99.0.43-1 ... 9.0.70-1 (28 versions)9.0.70-2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 57× in last 7d / 366× 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 442 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-59083?
CVE-2026-59083 is a critical vulnerability published on July 14, 2026. Improper Handling of URL Encoding (Hex Encoding) vulnerability in Apache Tomcat's rewrite valve allowed security constraint bypass for some configurations. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.23, from 10.1.0-M1 through 10.1.56, from 9.0.0.M1 through 9.0.119, from 8.5.0…
When was CVE-2026-59083 disclosed?
CVE-2026-59083 was first published in the National Vulnerability Database on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-59083 actively exploited?
CVE-2026-59083 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 70.2% of all scored CVEs.
What is the CVSS score of CVE-2026-59083?
CVE-2026-59083 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-59083?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-59083, 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

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