CVE-2026-58156

MEDIUMPre-NVD 4.94.9—
EchelonGraph scoreMEDIUM confidence

Score 4.9 from GitHub Security Advisory published 2026-07-29. a secondary CVSS source baseline 4.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
4.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.9Exploit: None knownExposed: 0

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

Apache Traffic Server mis-parses ports in URLs and userinfo, allowing port-based access-control bypass.

This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3.

Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

CVSS v3
4.9
EG Score
4.9(medium)
EG Risk
22(Track)
EG Risk 22/100SSVC: 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
Severity49% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

July 29, 2026

Last Modified

August 3, 2026

Advisory Details (1)

Auto-updated Jul 29, 2026
No patch confirmed yet.
generic
https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d

Vendor Advisories for CVE-2026-58156(1)

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

Affected Packages

(2 across 2 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
trafficserver8.1.1+ds-1.1 ... 9.2.5+ds-1 (40 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
trafficserver9.2.0+ds-2 ... 9.2.5+ds-1 (14 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 71× 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 135 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-58156?
CVE-2026-58156 is a medium vulnerability published on July 29, 2026. Apache Traffic Server mis-parses ports in URLs and userinfo, allowing port-based access-control bypass. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix…
When was CVE-2026-58156 disclosed?
CVE-2026-58156 was first published in the National Vulnerability Database on July 29, 2026, with the most recent update on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58156 actively exploited?
CVE-2026-58156 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 83.8% of all scored CVEs.
What is the CVSS score of CVE-2026-58156?
CVE-2026-58156 has a CVSS v3 base score of 4.9 (NVD).
How do I remediate CVE-2026-58156?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58156, 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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