CVE Explorer
CVE-2026-2833
An HTTP request smuggling vulnerability (CWE-444) was found in Pingora's handling of HTTP/1.1 connection upgrades. The issue occurs when a Pingora proxy reads a request containing an Upgrade header, causing the proxy to pass through the rest of the bytes on the connection to a backend before the backend has accepted the upgrade. An attacker can thus directly forward a malicious payload after a request with an Upgrade header to that backend in a way that may be interpreted as a subsequent request
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"https://github.com/cloudflare/pingora","repo":"https://github.com/cloudflare/pingora","vendor":"Cloudflare","versions":[{"lessThan":"0.8.0","status":"affected","version":"0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:6a256f352439d3203afcc8c058969d8ce0d02e1272dc702296942f87e29ec5b3 · sha256:e328cc17687a6691… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":9.3,"baseSeverity":"CRITICAL","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpac…
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:6a256f352439d3203afcc8c058969d8ce0d02e1272dc702296942f87e29ec5b3 · sha256:e328cc17687a6691… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-444","description":"CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:6a256f352439d3203afcc8c058969d8ce0d02e1272dc702296942f87e29ec5b3 · sha256:e328cc17687a6691… · /containers/cna/problemTypes/0/descriptions/0
Source references
1 source assertion{"url":"https://github.com/cloudflare/pingora"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:6a256f352439d3203afcc8c058969d8ce0d02e1272dc702296942f87e29ec5b3 · sha256:e328cc17687a6691… · /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.