CVE-2026-3784

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

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

Score 6.5 from GitHub Security Advisory published 2026-03-11. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory

Also known asEUVD-2026-11139 (ENISA EUVD) · GHSA-5q3w-6p3j-mw6p (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
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: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request uses different credentials for the HTTP proxy. The proper behavior is to create or use a separate connection.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 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
0.4%
EPSS %ILE
37th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

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.

The score's inputs: 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

March 11, 2026

Last Modified

September 15, 2026

Advisory Details (5)

Auto-updated Aug 4, 2026
Patch available.
Web page

oss-security - [ADVISORY] curl: CVE-2026-3784: wrong proxy connection reuse with credentials

http://www.openwall.com/lists/oss-security/2026/03/11/3
Web page

curl - wrong proxy connection reuse with credentials - CVE-2026-3784

https://curl.se/docs/CVE-2026-3784.html

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibcurl4-openssl-dev (7.68.0-1ubuntu2.25+esm3) @ focal2026-10-23ubuntu
ubuntulibcurl4-openssl-dev (7.81.0-1ubuntu1.23) @ jammy2026-10-23ubuntu
redhatcurl-main-8.22.0-1.1.hum12026-10-07redhat
redhatcurl-0:8.12.1-1.el10_0.102026-09-28redhat
redhatcurl2026-08-19redhat
redhatcurl-0:8.12.1-4.el10_2.32026-08-17redhat
redhatcurl-main-8.19.0-3.1.hum12026-04-10redhat
redhatcurl-main-8.19.0-3.hum12026-04-07redhat

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

(6 across 6 ecosystems)
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.7 up to 8.19.0-r0: fixed in 8.19.0-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
curl—
  • 7.7 up to 8.19.0-r0: fixed in 8.19.0-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
curl7.74.0-1.3 ... 8.9.1-2~bpo12+1 (219 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
curl7.88.1-10 ... 7.88.1-10+deb12u9 (18 versions)
  • every version up to 7.88.1-10+deb12u15: fixed in 7.88.1-10+deb12u15
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
curl8.14.1-2, 8.14.1-2+deb13u1, 8.14.1-2+deb13u2, 8.14.1-2+deb13u2~bpo13+1, 8.14.1-2+deb13u3
  • every version up to 8.14.1-2+deb13u4: fixed in 8.14.1-2+deb13u4
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
curl8.14.1-2 ... 8.19.0~rc3-1 (36 versions)
  • every version up to 8.19.0-1: fixed in 8.19.0-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(2)

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 8× in last 7d / 41× 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 220 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 121 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  2. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  3. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  4. 2026-10-30 19:25 UTCOSV refresh
  5. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  6. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  7. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  8. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  9. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  10. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-10-25 14:32 UTCEG score recompute
  12. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-10-23 02:54 UTCEG score recompute
  15. 2026-10-23 02:54 UTCVendor advisory
  16. 2026-10-23 02:54 UTCGHSA enrichmentGHSA-5q3w-6p3j-mw6p · GitHub CVSS 6.5
  17. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  21. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  22. 2026-10-18 03:44 UTCEG score recompute
  23. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
Show 74 more
  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  4. 2026-10-12 16:11 UTCEG score recompute
  5. 2026-10-11 19:53 UTCEG score recompute
  6. 2026-10-11 17:06 UTCEG score recompute
  7. 2026-10-11 14:33 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  16. 2026-10-04 22:48 UTCOSV refresh
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  23. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.5% · 36th percentile
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  26. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  27. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  28. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  29. 2026-09-15 07:25 UTCVendor advisory
  30. 2026-09-15 07:25 UTCGHSA enrichmentGHSA-5q3w-6p3j-mw6p · GitHub CVSS 6.5
  31. 2026-09-15 06:40 UTCEG score recompute
  32. 2026-09-15 06:40 UTCVendor advisory
  33. 2026-09-15 06:40 UTCGHSA enrichmentGHSA-5q3w-6p3j-mw6p · GitHub CVSS 6.5
  34. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  35. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  36. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  37. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  38. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  39. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  40. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  41. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  42. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  43. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  44. 2026-09-02 20:10 UTCOSV refresh
  45. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  46. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  47. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  48. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  49. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  50. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  51. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  52. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  53. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  54. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  55. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  56. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  57. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  58. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  59. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  60. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  61. 2026-08-16 11:55 UTCEG score recompute
  62. 2026-08-16 11:55 UTCVendor advisory
  63. 2026-08-16 11:55 UTCGHSA enrichmentGHSA-5q3w-6p3j-mw6p · GitHub CVSS 6.5
  64. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  65. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  66. 2026-08-14 07:52 UTCEG score recompute
  67. 2026-08-14 07:52 UTCVendor advisory
  68. 2026-08-14 07:52 UTCGHSA enrichmentGHSA-5q3w-6p3j-mw6p · GitHub CVSS 6.5
  69. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  70. 2026-08-12 23:05 UTCEG score recompute
  71. 2026-08-12 23:05 UTCVendor advisory
  72. 2026-08-12 23:05 UTCGHSA enrichmentGHSA-5q3w-6p3j-mw6p · GitHub CVSS 6.5
  73. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 22nd percentile
  74. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.3% · 22nd percentile

Frequently asked(5)

What is CVE-2026-3784?
CVE-2026-3784 is a medium-severity vulnerability; its CVE record was published on March 11, 2026. curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request uses different credentials for the HTTP proxy. The proper behavior is to create or use a separate connection.
When was the CVE record for CVE-2026-3784 published?
The CVE record for CVE-2026-3784 was published on March 11, 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 September 15, 2026; the record at its source may have been updated since.
Is CVE-2026-3784 actively exploited?
CVE-2026-3784 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (37th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-3784?
CVE-2026-3784 has a CVSS v3.1 base score of 6.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-3784?
A fix for CVE-2026-3784 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-3784 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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