01 Record

CVE-2026-3784

wrong proxy connection reuse with credentials

MediumPUBLISHEDCNA: curl

CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

View raw JSON

02 Description

wrong proxy connection reuse with credentials

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.42% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 36.9% of scored records. A rank, not a probability.

NVD base score

6.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

NVD analysis status

Modified. NVD last modified this record on 2026-09-15.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2026-03-11 10:09Z7 MO AGO

Last updated

2026-09-15 06:02Z1 MO AGO

Reserved

2026-03-08

Assigning CNA

curl

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weaknesses

CWE-305Authentication Bypass by Primary WeaknessBase

Data version

5.2

Document digest

6bb426ca606cdbc47a64a66e43b216858b1d83e9939a93a331e77680d8f369f3

05 Affected products

VendorProductVersionsPlatforms

curlcurl7.7.0 to < 8.14.2, 8.15.0 to < 8.16.1, 8.17.0 to < 8.19.0, a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4 to < 5f13a7645e565c5c1a06f3ef86e97afb856fb364, 8.18.0, 8.17.0, 8.16.0, 8.15.0, 8.14.1, 8.14.0, 8.13.0, 8.12.1, 8.12.0, 8.11.1, 8.11.0, 8.10.1, 8.10.0, 8.9.1, 8.9.0, 8.8.0, 8.7.1, 8.7.0, 8.6.0, 8.5.0, 8.4.0, 8.3.0, 8.2.1, 8.2.0, 8.1.2, 8.1.1, 8.1.0, 8.0.1, 8.0.0, 7.88.1, 7.88.0, 7.87.0, 7.86.0, 7.85.0, 7.84.0, 7.83.1, 7.83.0, 7.82.0, 7.81.0, 7.80.0, 7.79.1, 7.79.0, 7.78.0, 7.77.0, 7.76.1, 7.76.0, 7.75.0, 7.74.0, 7.73.0, 7.72.0, 7.71.1, 7.71.0, 7.70.0, 7.69.1, 7.69.0, 7.68.0, 7.67.0, 7.66.0, 7.65.3, 7.65.2, 7.65.1, 7.65.0, 7.64.1, 7.64.0, 7.63.0, 7.62.0, 7.61.1, 7.61.0, 7.60.0, 7.59.0, 7.58.0, 7.57.0, 7.56.1, 7.56.0, 7.55.1, 7.55.0, 7.54.1, 7.54.0, 7.53.1, 7.53.0, 7.52.1, 7.52.0, 7.51.0, 7.50.3, 7.50.2, 7.50.1, 7.50.0, 7.49.1, 7.49.0, 7.48.0, 7.47.1, 7.47.0, 7.46.0, 7.45.0, 7.44.0, 7.43.0, 7.42.1, 7.42.0, 7.41.0, 7.40.0, 7.39.0, 7.38.0, 7.37.1, 7.37.0, 7.36.0, 7.35.0, 7.34.0, 7.33.0, 7.32.0, 7.31.0, 7.30.0, 7.29.0, 7.28.1, 7.28.0, 7.27.0, 7.26.0, 7.25.0, 7.24.0, 7.23.1, 7.23.0, 7.22.0, 7.21.7, 7.21.6, 7.21.5, 7.21.4, 7.21.3, 7.21.2, 7.21.1, 7.21.0, 7.20.1, 7.20.0, 7.19.7, 7.19.6, 7.19.5, 7.19.4, 7.19.3, 7.19.2, 7.19.1, 7.19.0, 7.18.2, 7.18.1, 7.18.0, 7.17.1, 7.17.0, 7.16.4, 7.16.3, 7.16.2, 7.16.1, 7.16.0, 7.15.5, 7.15.4, 7.15.3, 7.15.2, 7.15.1, 7.15.0, 7.14.1, 7.14.0, 7.13.2, 7.13.1, 7.13.0, 7.12.3, 7.12.2, 7.12.1, 7.12.0, 7.11.2, 7.11.1, 7.11.0, 7.10.8, 7.10.7, 7.10.6, 7.10.5, 7.10.4, 7.10.3, 7.10.2, 7.10.1, 7.10, 7.9.8, 7.9.7, 7.9.6, 7.9.5, 7.9.4, 7.9.3, 7.9.2, 7.9.1, 7.9, 7.8.1, 7.8, 7.7.3, 7.7.2, 7.7.1, 7.7—

06 References

curl.sehttps://curl.se/docs/CVE-2026-3784.json
curl.sehttps://curl.se/docs/CVE-2026-3784.html
hackerone.comhttps://hackerone.com/reports/3584903
www.openwall.comhttp://www.openwall.com/lists/oss-security/2026/03/11/3
cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-253495.html

07 Fixed in

Debian 12

curl
Fixed in 7.88.1-10+deb12u15

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

curl
Fixed in 8.14.1-2+deb13u4

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

curl
Fixed in 8.19.0-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.