CVE-2026-55995

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (34th percentile of EPSS-scored CVEs). 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, secondary
Trending — 4 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.7Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A Double Free vulnerability in open-iscsi allows an unauthenticated MITM attacker to cause DoS.

This issue affects open-iscsi: from ? through 56718d4e9d1a4f51c30697b5c0534144bb41c9bb.

CVSS v3
8.7
EG Score
8.7HIGHmedium confidence
EG Risk
44
EG Risk 44/100CISA SSVC

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
Severity87% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 29, 2026

Last Modified

July 30, 2026

Advisory Details (2)

Auto-updated Jul 29, 2026
Patch available. Sources: github_commit.
github_commit

commit 56718d4e9d1a (open-iscsi/open-isns)

Fix landed in open-iscsi/open-isns commit 56718d4e9d1a — awaiting tagged release

https://github.com/open-iscsi/open-isns/commit/56718d4e9d1a4f51c30697b5c0534144bb41c9bb
generic

Making sure you're not a bot!

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-55995

Vendor Advisories for CVE-2026-55995(10)

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

Patch Availability(11)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuopen-isns-utils (0.101-0ubuntu2.1) @ jammy2026-10-07ubuntu
redhatisns-utils-0:0.99-1.el8_4.12026-08-31redhat
redhatisns-utils-0:0.99-1.el8_6.12026-08-26redhat
redhatisns-utils-0:0.99-1.el8_8.12026-08-26redhat
redhatisns-utils-0:0.101-4.el9_4.12026-08-26redhat
redhatisns-utils-0:0.101-4.el9_6.12026-08-26redhat
redhatisns-utils-0:0.101-4.el9_2.12026-08-26redhat
redhatisns-utils-0:0.103-1.el10_0.12026-08-26redhat
redhatisns-utils-0:0.99-1.el8_10.12026-08-11redhat
redhatisns-utils-0:0.101-4.el9_8.12026-08-11redhat
redhatisns-utils-0:0.103-1.el10_2.12026-08-11redhat

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
open-isns0.100-3 ... 0.103-2 (10 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
open-isns0.101-0.2 ... 0.103-2 (8 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
open-isns0.101-1, 0.101-2, 0.101-2.1, 0.103-1, 0.103-2
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
open-isns0.101-1, 0.101-2, 0.101-2.1, 0.103-1
  • every version up to 0.103-2: fixed in 0.103-2
—

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 16× in last 7d / 99× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 303 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 203 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  2. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  3. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  4. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  5. 2026-10-07 00:01 UTCEG score recompute
  6. 2026-10-07 00:01 UTCVendor advisory
  7. 2026-10-07 00:01 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  8. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-10-05 20:53 UTCEG score recompute
  10. 2026-10-05 20:53 UTCVendor advisory
  11. 2026-10-05 20:53 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  12. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-10-05 02:37 UTCEG score recompute
  14. 2026-10-05 02:37 UTCVendor advisory
  15. 2026-10-05 02:37 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  17. 2026-10-04 07:02 UTCEG score recompute
  18. 2026-10-04 07:02 UTCVendor advisory
  19. 2026-10-04 07:02 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  20. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-10-02 17:58 UTCEG score recompute
  22. 2026-10-02 17:58 UTCVendor advisory
  23. 2026-10-02 17:58 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  24. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  25. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
Show 75 more
  1. 2026-10-01 15:43 UTCVendor advisory
  2. 2026-10-01 15:43 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  3. 2026-10-01 03:36 UTCEG score recompute
  4. 2026-10-01 03:36 UTCVendor advisory
  5. 2026-10-01 03:36 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  6. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  7. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-09-29 07:36 UTCEG score recompute
  9. 2026-09-29 07:36 UTCVendor advisory
  10. 2026-09-29 07:36 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  11. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  12. 2026-09-28 03:17 UTCEG score recompute
  13. 2026-09-28 03:17 UTCVendor advisory
  14. 2026-09-28 03:17 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  15. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  16. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  17. 2026-09-25 05:41 UTCEG score recompute
  18. 2026-09-25 05:41 UTCVendor advisory
  19. 2026-09-25 05:41 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  20. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  21. 2026-09-24 09:52 UTCVendor advisory
  22. 2026-09-24 09:52 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  23. 2026-09-23 21:50 UTCEG score recompute
  24. 2026-09-23 21:50 UTCVendor advisory
  25. 2026-09-23 21:50 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  26. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  27. 2026-09-23 03:52 UTCVendor advisory
  28. 2026-09-23 03:52 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  29. 2026-09-22 15:49 UTCEG score recompute
  30. 2026-09-22 15:49 UTCVendor advisory
  31. 2026-09-22 15:49 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  32. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  33. 2026-09-20 00:23 UTCEG score recompute
  34. 2026-09-20 00:23 UTCVendor advisory
  35. 2026-09-20 00:23 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  36. 2026-09-19 04:55 UTCEG score recompute
  37. 2026-09-19 04:55 UTCVendor advisory
  38. 2026-09-19 04:55 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  39. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  40. 2026-09-18 15:17 UTCVendor advisory
  41. 2026-09-18 15:17 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  42. 2026-09-18 01:42 UTCEG score recompute
  43. 2026-09-18 01:42 UTCVendor advisory
  44. 2026-09-18 01:42 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  45. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  46. 2026-09-17 01:36 UTCEG score recompute
  47. 2026-09-17 01:36 UTCVendor advisory
  48. 2026-09-17 01:36 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  49. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  50. 2026-09-16 05:49 UTCEG score recompute
  51. 2026-09-16 05:49 UTCVendor advisory
  52. 2026-09-16 05:49 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  53. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  54. 2026-09-15 08:07 UTCEG score recompute
  55. 2026-09-15 08:07 UTCVendor advisory
  56. 2026-09-15 08:07 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  57. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  58. 2026-09-14 08:52 UTCVendor advisory
  59. 2026-09-14 08:52 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  60. 2026-09-13 20:49 UTCEG score recompute
  61. 2026-09-13 20:49 UTCVendor advisory
  62. 2026-09-13 20:49 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  63. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  64. 2026-09-13 08:46 UTCVendor advisory
  65. 2026-09-13 08:46 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  66. 2026-09-12 20:43 UTCEG score recompute
  67. 2026-09-12 20:43 UTCVendor advisory
  68. 2026-09-12 20:43 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  69. 2026-09-12 08:37 UTCVendor advisory
  70. 2026-09-12 08:37 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  71. 2026-09-11 20:25 UTCEG score recompute
  72. 2026-09-11 20:25 UTCVendor advisory
  73. 2026-09-11 20:25 UTCGHSA enrichmentGHSA-93fw-mwmg-2g5m · GitHub severity HIGH
  74. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  75. 2026-09-11 07:57 UTCVendor advisory

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55995?
CVE-2026-55995 is a high vulnerability published on July 29, 2026. A Double Free vulnerability in open-iscsi allows an unauthenticated MITM attacker to cause DoS. This issue affects open-iscsi: from ? through 56718d4e9d1a4f51c30697b5c0534144bb41c9bb.
When was the CVE record for CVE-2026-55995 published?
The CVE record for CVE-2026-55995 was published on July 29, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 30, 2026; the record at its source may have been updated since.
Is CVE-2026-55995 actively exploited?
CVE-2026-55995 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55995?
CVE-2026-55995 has a CVSS base score of 8.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55995?
A fix for CVE-2026-55995 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-55995 are linked in the Vendor Advisories panel on this page.

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