CVE-2026-15165

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 5.5 from GitHub Security Advisory published 2026-07-08. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated
5.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 5.5Exploit: No code on recordExposed services: Not assessed

Upgrade to version 4.6.7 or above (from the CVE record's solution, GitLab Inc.) — apply it.

TLS ECH decryptor crash in Wireshark 4.6.0 to 4.6.6 allows denial of service

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
41
EG Risk 41/100

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 (value × EchelonGraph’s weight)
Severity55% × 45%
The EG Score, 5.5 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: Upgrade to version 4.6.7 or above (from the CVE record's solution, GitLab Inc.). Apply it within your standard update timelines.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

Upgrade to version 4.6.7 or above (from the CVE record's solution, GitLab Inc.). Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 8, 2026

Last Modified

July 10, 2026

Advisory Details (1)

Auto-updated Jul 8, 2026
Fix named in the CVE record's solution (GitLab Inc.).
Web page

[Security] TLS ECH transcript reconstruction: heap buffer overflow via repeated ech_outer_extensions (#21390) · Issues · Wireshark Foundation / Wireshark · GitLab

https://gitlab.com/wireshark/wireshark/-/work_items/21390

Vendor Advisories for CVE-2026-15165(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark3.4.10-0+deb11u1 ... 4.6.6-2 (69 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.0.10-1 ... 4.6.6-2 (50 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.13-0+deb13u1 ... 4.6.6-2 (20 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
wireshark4.4.7-1 ... 4.6.6-2 (16 versions)
  • every version on: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 33× 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 178 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 78 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  2. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  3. 2026-10-12 16:32 UTCEG score recompute
  4. 2026-10-11 20:10 UTCEG score recompute
  5. 2026-10-11 17:22 UTCEG score recompute
  6. 2026-10-11 14:55 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  8. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  9. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  10. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  11. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  13. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  14. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  17. 2026-10-01 16:09 UTCEG score recompute
  18. 2026-10-01 16:09 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  19. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  20. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  22. 2026-09-28 13:20 UTCEG score recompute
  23. 2026-09-28 13:20 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  24. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-24 11:46 UTCEG score recompute
Show 75 more
  1. 2026-09-24 11:46 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  2. 2026-09-23 06:04 UTCEG score recompute
  3. 2026-09-23 06:04 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  4. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  5. 2026-09-18 05:42 UTCEG score recompute
  6. 2026-09-18 05:42 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  7. 2026-09-16 14:07 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-09-14 07:16 UTCEG score recompute
  10. 2026-09-14 07:16 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  11. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-09-13 08:23 UTCEG score recompute
  13. 2026-09-13 08:23 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  14. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-09-12 03:30 UTCEG score recompute
  16. 2026-09-12 03:30 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  17. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  20. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  22. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  23. 2026-09-05 22:46 UTCEG score recompute
  24. 2026-09-05 22:46 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  25. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  26. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  27. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  28. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  29. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  30. 2026-08-30 07:28 UTCEG score recompute
  31. 2026-08-30 07:28 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  32. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  33. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  34. 2026-08-27 21:49 UTCEG score recompute
  35. 2026-08-27 21:49 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  36. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  37. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  38. 2026-08-26 04:45 UTCEG score recompute
  39. 2026-08-26 04:45 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  40. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  41. 2026-08-25 03:09 UTCEG score recompute
  42. 2026-08-25 03:09 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  43. 2026-08-24 04:10 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  44. 2026-08-23 05:19 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  45. 2026-08-22 06:24 UTCEG score recompute
  46. 2026-08-22 06:24 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  47. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  48. 2026-08-21 07:31 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  49. 2026-08-20 08:39 UTCEG score recompute
  50. 2026-08-20 08:39 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  51. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  52. 2026-08-19 09:47 UTCEG score recompute
  53. 2026-08-19 09:47 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  54. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  55. 2026-08-18 10:48 UTCEG score recompute
  56. 2026-08-18 10:48 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  57. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  58. 2026-08-17 11:23 UTCEG score recompute
  59. 2026-08-17 11:23 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  60. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  61. 2026-08-16 12:31 UTCEG score recompute
  62. 2026-08-16 12:31 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  63. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  64. 2026-08-15 13:39 UTCEG score recompute
  65. 2026-08-15 13:39 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  66. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  67. 2026-08-14 14:36 UTCEG score recompute
  68. 2026-08-14 14:36 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  69. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  70. 2026-08-13 15:44 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  71. 2026-08-12 16:43 UTCEG score recompute
  72. 2026-08-12 16:43 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5
  73. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  74. 2026-08-11 17:52 UTCEG score recompute
  75. 2026-08-11 17:51 UTCGHSA enrichmentGHSA-3q2h-7599-7r76 · GitHub CVSS 5.5

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-15165?
CVE-2026-15165 is a medium-severity vulnerability; its CVE record was published on July 8, 2026. TLS ECH decryptor crash in Wireshark 4.6.0 to 4.6.6 allows denial of service
When was the CVE record for CVE-2026-15165 published?
The CVE record for CVE-2026-15165 was published on July 8, 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 10, 2026; the record at its source may have been updated since.
Is CVE-2026-15165 actively exploited?
CVE-2026-15165 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-15165?
CVE-2026-15165 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-15165?
The CVE record's solution for CVE-2026-15165, written by its CNA GitLab Inc., names the fix: "Upgrade to version 4.6.7 or above". The vendor advisories EchelonGraph has for CVE-2026-15165 are linked in the Vendor Advisories panel on this page.

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