Threat Intel

v0.1

← CVEs

CVE-2026-1965

MED 6.5
Published
2026-03-11
Last Modified
2026-03-12
Affected Apps
28
Affected Devices
189
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
libcurl can in some circumstances reuse the wrong connection when asked to do an Negotiate-authenticated HTTP or HTTPS request. libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criterion must first be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different credentials. One underlying reason being that Negotiate sometimes authenticates *connections* and not *requests*, contrary to how HTTP is designed to work. An application that allows Negotiate authentication to a server (that responds wanting Negotiate) with `user1:password1` and then does another operation to the same server also using Negotiate but with `user2:password2` (while the previous connection is still alive) - the second request wrongly reused the same connection and since it then sees that the Negotiate negotiation is already made, it just sends the request over that connection thinking it uses the user2 credentials when it is in fact still using the connection authenticated for user1... The set of authentication methods to use is set with `CURLOPT_HTTPAUTH`. Applications can disable libcurl's reuse of connections and thus mitigate this problem, by using one of the following libcurl options to alter how connections are or are not reused: `CURLOPT_FRESH_CONNECT`, `CURLOPT_MAXCONNECTS` and `CURLMOPT_MAX_HOST_CONNECTIONS` (if using the curl_multi API).
Affected Applications in Environment 28
curl v7.81.0-1ubuntu1.23
27 devices
curl v8.5.0-2ubuntu10.8
57 devices
curl v8.14.1-2+deb13u2
12 devices
curl v7.68.0-1ubuntu2.25
11 devices
curl v7.76.1-34.el9
4 devices
curl v7.76.1-35.el9_7.3
2 devices
curl v7.74.0-1.3+deb11u16
11 devices
curl v7.76.1-31.el9_6.1
23 devices
curl v7.64.0-4+deb10u9
1 device
curl v8.12.1-2.el10_1.2
1 device
curl v7.88.1-10+deb12u14
17 devices
curl v7.74.0-1.3+deb11u15
1 device
curl v7.61.1-34.el8_10.9
3 devices
curl v7.61.1-30.el8_8.3
2 devices
curl v7.76.1-31.el9_6.1
1 device
curl v7.47.0-1ubuntu2.19
3 devices
curl v7.47.0-1ubuntu2.19+esm15
1 device
curl v8.5.0-2ubuntu10.6
1 device
curl v7.61.1-34.el8_10.3
2 devices
curl v7.61.1-34.el8_10.9
1 device
curl v7.58.0-2ubuntu3.24
1 device
curl v8.12.1-3ubuntu1
1 device
curl v7.76.1-35.el9_7.3
1 device
curl v7.61.1-34.el8_10.8
1 device
curl v7.29.0-59.el7_9.1
1 device
curl v7.61.1-34.el8_10.3
1 device
curl v7.35.0-1ubuntu2.20
1 device
curl v7.61.1-34.el8_10.10
1 device
Affected Devices 189
2ua5171h8k Linux DPCOMPdemoserver Linux DPNCHA-194733 Linux acmedns Linux administrator-SYS-4029GP-TRT2 Linux aggietower Linux ah-ots Linux atc.db.usu.edu Linux auto-score Linux awep1 Linux bacha25 Linux bennett-HP-Z2-SFF-G4-Workstation Linux blakeutil Linux bloodhound Linux capahab Linux cceredcapdb Linux cceredcapweb Linux chat Linux chela03 Linux chela04 Linux chela05 Linux cleanaddressdev.banner.usu.edu Linux csf Linux devjobsub.banner.usu.edu Linux dispatch Linux dist Linux dpapsb-161390.aggies.usu.edu Linux dpapsb-191594.mypc.usu.edu Linux e911-provision Linux educweb Linux el103-02.ece.usu.edu Linux el103-03.ece.usu.edu Linux el103-04.ece.usu.edu Linux el103-05.ece.usu.edu Linux el103-07.ece.usu.edu Linux el103-08.ece.usu.edu Linux el103-09.ece.usu.edu Linux el103-10.ece.usu.edu Linux el103-14.ece.usu.edu Linux el103-15.ece.usu.edu Linux el103-16.ece.usu.edu Linux el103-17.ece.usu.edu Linux el103-18.ece.usu.edu Linux el103-19.ece.usu.edu Linux el103-20.ece.usu.edu Linux el120-01.ece.usu.edu Linux el120-02.ece.usu.edu Linux el120-03.ece.usu.edu Linux el120-04.ece.usu.edu Linux el120-05.ece.usu.edu Linux el120-06.ece.usu.edu Linux el120-08.ece.usu.edu Linux el120-09.ece.usu.edu Linux el120-10.ece.usu.edu Linux el120-11.ece.usu.edu Linux el120-12.ece.usu.edu Linux el120-14.ece.usu.edu Linux elend Linux emby Linux eprocdev.banner.usu.edu Linux ezidadmin Linux ezri-utility-01 Linux facreadyprod.pplant.usu.edu Linux facreadytestrhel.pplant.usu.edu Linux facshibsp2.pplant.usu.edu Linux finch Linux flexnet Linux flo-rida Linux fw Linux gravekeeper Linux gul4.usu.edu Linux guru.cluster Linux hackedpasswords Linux hotcheeto Linux infosec-grafana Linux intune-mcc1 Linux intune-mcc3 Linux iperf Linux itfinance Linux itls-wp Linux jed Linux joek-HP-Z2-SFF-G9-Workstation-Desktop-PC Linux kcm.usu.edu Linux kena-utility Linux kmlab Linux ldap-lb01 Linux ldap-lb02 Linux libki-server Linux librenms Linux librenmsdb Linux log Linux lumbermill Linux mail Linux mail Linux minemeld Linux mirror3 Linux miscdata Linux miscnet Linux monitor01 Linux monitor02 Linux my1 Linux my2 Linux mysql02 Linux netbox Linux nt Linux omekanew Linux oms.db.usu.edu Linux owenclarke-OptiPlex-7090 Linux paymentworksdev.banner.usu.edu Linux portscan01 Linux portscan02 Linux privatebin Linux promnet Linux rcbd Linux rcdb-dev Linux redcapweb Linux refraction Linux s2backups Linux seaweed Linux second-thrifted-tractor Linux sectap1 Linux sentry Linux server1mathusuedu Linux server2math Linux soc Linux solar Linux spencer-funk-HP-Z2-SFF-G5-Workstation Linux starfleetpad Linux steesh Linux storm Linux strat Linux svn.usu.edu Linux sympa.ser321.usu.edu Linux sys-serv-l-301-data Linux thegrid Linux thinkstation Linux thnotes Linux tsutil.it.usu.edu Linux vinmathusuedu Linux vrtour Linux web-lb-stage.usu.edu Linux web-lb01-redirect.usu.edu Linux web-lb01.usu.edu Linux web-lb02-redirect.usu.edu Linux web-lb02.usu.edu Linux web-lb03-redirect.usu.edu Linux web-lb03.usu.edu Linux web-lb04.usu.edu Linux web02.usu.edu Linux web03.usu.edu Linux web04a Linux web05 Linux web06 Linux web08.usu.edu Linux web09.usu.edu Linux web10 Linux web10-awhc Linux web10-awhc Linux web11.usu.edu Linux web12.usu.edu Linux web13.usu.edu Linux web14.usu.edu Linux web15.usu.edu Linux web16.usu.edu Linux web17 Linux web18 Linux web19.usu.edu Linux web20 Linux web21 Linux web22 Linux web23 Linux web24 Linux web25 Linux web27.usu.edu Linux web28 Linux web29.usu.edu Linux web30.usu.edu Linux web31.usu.edu Linux web32.usu.edu Linux web33.usu.edu Linux web34.usu.edu Linux web35.usu.edu Linux web36.usu.edu Linux web37.usu.edu Linux webs.usu.edu Linux webtools Linux wpad Linux yasls Linux zldtst.db.usu.edu Linux
References 2