CVE Explorer

CVE-2026-1965

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 diff

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a684d48f0307dc1229297581465528edef795f874b75df3f7046be6f4e1253df

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-305","description":"CWE-305 Authentication Bypass by Primary Weakness","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:d07b4eb9a7fb5b6fc0c1a6e377cd0d083c170b15cc83578d21122c8d0ec7aecd · sha256:681650e2d98775e0… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"CWE-305 Authentication Bypass by Primary Weakness","lang":"en"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:d07b4eb9a7fb5b6fc0c1a6e377cd0d083c170b15cc83578d21122c8d0ec7aecd · sha256:681650e2d98775e0… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion

{"defaultStatus":"unaffected","product":"curl","vendor":"curl","versions":[{"lessThanOrEqual":"8.18.0","status":"affected","version":"8.18.0","versionType":"semver"},{"lessThanOrEqual":"8.17.0","status":"affected","version":"8.17.0","versionType":"semver"},{"lessThanOrEqual":"8.16.0","status":"affected","version":"8.16.0","versionType":"semver"},{"lessThanOrEqual":"8.15.0","status":"affected","version":"8.15.0","versionType":"semver"},{"lessThanOrEqual":"8.14.1","status":"affected","version":"8.14.1","versionType":"semver"},{"lessThanOrEqual":"8.14.0","status":"affected","version":"8.14.0","ve…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:d07b4eb9a7fb5b6fc0c1a6e377cd0d083c170b15cc83578d21122c8d0ec7aecd · sha256:681650e2d98775e0… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:d07b4eb9a7fb5b6fc0c1a6e377cd0d083c170b15cc83578d21122c8d0ec7aecd · sha256:681650e2d98775e0… · /containers/adp/0/metrics/0/cvssV3_1

CWE assertions

2 source assertions

{"cweId":"CWE-305","description":"CWE-305 Authentication Bypass by Primary Weakness","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:d07b4eb9a7fb5b6fc0c1a6e377cd0d083c170b15cc83578d21122c8d0ec7aecd · sha256:681650e2d98775e0… · /containers/adp/0/problemTypes/0/descriptions/0

{"description":"CWE-305 Authentication Bypass by Primary Weakness","lang":"en"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:d07b4eb9a7fb5b6fc0c1a6e377cd0d083c170b15cc83578d21122c8d0ec7aecd · sha256:681650e2d98775e0… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"www","url":"https://curl.se/docs/CVE-2026-1965.html"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:d07b4eb9a7fb5b6fc0c1a6e377cd0d083c170b15cc83578d21122c8d0ec7aecd · sha256:681650e2d98775e0… · /containers/cna/references/1

{"name":"json","url":"https://curl.se/docs/CVE-2026-1965.json"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:d07b4eb9a7fb5b6fc0c1a6e377cd0d083c170b15cc83578d21122c8d0ec7aecd · sha256:681650e2d98775e0… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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