CVE-2026-8500

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 9.8Exploit: NoneExposed: 0

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

Web::Passwd versions through 0.03 for Perl is vulnerable to RCE.

Web::Passwd is a small CGI application for managing htpasswd files using the htpasswd command.

The user parameter is not validated or escaped, and is used as the last argument on the command line, allowing for command injection.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
73.9%
KEV
Not listed

Published

May 13, 2026

Last Modified

May 14, 2026

Advisory Details (3)

Auto-updated Jun 21, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-8500: Web::Passwd versions through 0.03 for Perl is vulnerable to RCE

http://www.openwall.com/lists/oss-security/2026/05/13/8
generic

Web-Passwd-0.03 - Web-based htpasswd Management - metacpan.org

https://metacpan.org/release/EVANK/Web-Passwd-0.03
generic

htpasswd - Manage user files for basic authentication - Apache HTTP Server Version 2.4

https://httpd.apache.org/docs/current/programs/htpasswd.html

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 63× 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 279 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-8500?
CVE-2026-8500 is a critical vulnerability published on May 13, 2026. Web::Passwd versions through 0.03 for Perl is vulnerable to RCE. Web::Passwd is a small CGI application for managing htpasswd files using the htpasswd command. The user parameter is not validated or escaped, and is used as the last argument on the command line, allowing for command injection.
When was CVE-2026-8500 disclosed?
CVE-2026-8500 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on May 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-8500 actively exploited?
CVE-2026-8500 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 73.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-8500?
CVE-2026-8500 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-8500?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-8500, 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.

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