CVE-2026-5085

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-13. NVD baseline CVSS 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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

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

Solstice::Session versions through 1440 for Perl generates session ids insecurely.

The _generateSessionID method returns an MD5 digest seeded by the epoch time, a random hash reference, a call to the built-in rand() function and the process id.

The same method is used in the _generateID method in Solstice::Subsession, which is part of the same distribution.

The epoch time may be guessed, if it is not leaked in the HTTP Date header. Stringified hash refences will contain predictable content. The built-in rand() function is seeded by 16-bits and is unsuitable for security purposes. The process id comes from a small set of numbers.

Predictable session ids could allow an attacker to gain access to systems.

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
27%
KEV
Not listed

Published

April 13, 2026

Last Modified

April 23, 2026

Advisory Details (4)

Auto-updated Aug 1, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-5085: Solstice::Session versions through 1440 for Perl generates session ids insecurely

http://www.openwall.com/lists/oss-security/2026/04/13/2
generic

CPAN Author’s Guide to Random Data for Security — CPAN Security Group (CPANSec) 🦆

https://security.metacpan.org/docs/guides/random-data-for-security.html
generic

Client Challenge

https://metacpan.org/dist/Solstice/source/lib/Solstice/Subsession.pm#L105
generic

Client Challenge

https://metacpan.org/dist/Solstice/source/lib/Solstice/Session.pm#L481

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 25× 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 224 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-5085?
CVE-2026-5085 is a critical vulnerability published on April 13, 2026. Solstice::Session versions through 1440 for Perl generates session ids insecurely. The _generateSessionID method returns an MD5 digest seeded by the epoch time, a random hash reference, a call to the built-in rand() function and the process id. The same method is used in the _generateID method in…
When was CVE-2026-5085 disclosed?
CVE-2026-5085 was first published in the National Vulnerability Database on April 13, 2026, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-5085 actively exploited?
CVE-2026-5085 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 73.0% of all scored CVEs.
What is the CVSS score of CVE-2026-5085?
CVE-2026-5085 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-5085?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-5085, 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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