CVE-2026-38974

MEDIUMPre-NVD 5.35.3
EchelonGraph scoreMEDIUM confidence

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

Score 5.3 from GitHub Security Advisory published 2026-07-16. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
5.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Dulwich through 1.1.0 was found to be missing SSH host key verification in contrib/paramiko_vendor.py.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100

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)
Severity53% × 45%
The EG Score, 5.3 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (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: 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
0.3%
EPSS %ILE
23rd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; 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 (CISA Vulnrichment) · Automatable yes (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)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (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 15, 2026

Last Modified

July 16, 2026

Advisory Details (2)

Auto-updated Jul 19, 2026
Patch available. Sources: github_pr.
GitHub pull request Patch Available

[bug fix] contrib: fix paramiko host key verification

Patch available: jelmer/dulwich dulwich-1.2.0 (PR #2123 merged 2026-03-25)

https://github.com/jelmer/dulwich/pull/2123
Web page

GitHub - jelmer/dulwich: Pure-Python Git implementation · GitHub

https://github.com/jelmer/dulwich

Vendor Advisories for CVE-2026-38974(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
dulwich0.20.15-1 ... 1.2.7-2 (38 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
dulwich0.21.2-1 ... 1.2.7-2 (21 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
dulwich0.22.7-1 ... 1.2.7-2 (17 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
dulwich0.22.7-1 ... 1.1.0-3 (10 versions)
  • every version up to 1.2.0-1: fixed in 1.2.0-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 37× 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 99 of 175 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 76 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  3. 2026-10-12 16:10 UTCEG score recompute
  4. 2026-10-11 19:52 UTCEG score recompute
  5. 2026-10-11 17:06 UTCEG score recompute
  6. 2026-10-11 14:32 UTCEG score recompute
  7. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  12. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  15. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  16. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  17. 2026-10-01 12:47 UTCEG score recompute
  18. 2026-10-01 12:47 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  21. 2026-09-28 08:49 UTCEG score recompute
  22. 2026-09-28 08:49 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  24. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 23rd percentile
  25. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
Show 74 more
  1. 2026-09-24 08:56 UTCEG score recompute
  2. 2026-09-24 08:56 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  3. 2026-09-23 03:24 UTCEG score recompute
  4. 2026-09-23 03:24 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  5. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  6. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  7. 2026-09-18 04:48 UTCEG score recompute
  8. 2026-09-18 04:48 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  9. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  10. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  11. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  12. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  13. 2026-09-14 06:48 UTCEG score recompute
  14. 2026-09-14 06:48 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  15. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  16. 2026-09-13 07:27 UTCEG score recompute
  17. 2026-09-13 07:27 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  18. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  19. 2026-09-11 21:50 UTCEG score recompute
  20. 2026-09-11 21:50 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  21. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  22. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  23. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  24. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  25. 2026-09-08 00:59 UTCEG score recompute
  26. 2026-09-08 00:59 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  27. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  28. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  29. 2026-09-05 20:54 UTCEG score recompute
  30. 2026-09-05 20:54 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  31. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  32. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  33. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  34. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  35. 2026-08-31 04:34 UTCEG score recompute
  36. 2026-08-31 04:34 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  37. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  38. 2026-08-30 03:59 UTCEG score recompute
  39. 2026-08-30 03:59 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  40. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  41. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  42. 2026-08-27 22:34 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  43. 2026-08-26 23:14 UTCEG score recompute
  44. 2026-08-26 23:14 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  45. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  46. 2026-08-25 21:09 UTCEG score recompute
  47. 2026-08-25 21:09 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  48. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  49. 2026-08-24 21:43 UTCEG score recompute
  50. 2026-08-24 21:43 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  51. 2026-08-23 21:48 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  52. 2026-08-22 22:27 UTCEG score recompute
  53. 2026-08-22 22:27 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  54. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  55. 2026-08-21 23:06 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  56. 2026-08-20 23:42 UTCEG score recompute
  57. 2026-08-20 23:42 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  58. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  59. 2026-08-20 00:21 UTCEG score recompute
  60. 2026-08-20 00:21 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  61. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  62. 2026-08-18 21:56 UTCEG score recompute
  63. 2026-08-18 21:55 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  64. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  65. 2026-08-17 21:52 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  66. 2026-08-16 22:24 UTCEG score recompute
  67. 2026-08-16 22:24 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  68. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  69. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  70. 2026-08-15 23:03 UTCEG score recompute
  71. 2026-08-15 23:03 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  72. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  73. 2026-08-14 23:42 UTCGHSA enrichmentGHSA-h7fr-r783-5g99 · GitHub CVSS 5.3
  74. 2026-08-14 00:21 UTCEG score recompute

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-38974?
CVE-2026-38974 is a medium-severity vulnerability; its CVE record was published on July 15, 2026. Dulwich through 1.1.0 was found to be missing SSH host key verification in contrib/paramiko_vendor.py.
When was the CVE record for CVE-2026-38974 published?
The CVE record for CVE-2026-38974 was published on July 15, 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 16, 2026; the record at its source may have been updated since.
Is CVE-2026-38974 actively exploited?
CVE-2026-38974 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (23rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-38974?
CVE-2026-38974 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-38974?
A fix for CVE-2026-38974 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-38974 are linked in the Vendor Advisories panel on this page.

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