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CVE-2026-48599

Authorization Bypass Through User-Controlled Key vulnerability in elixir-grpc grpc allows authenticated attackers to access or modify resources belonging to other users by smuggling a conflicting value for any path-bound field via the query string or request body. In 'Elixir.GRPC.Server.Transcode':map_request/5 (lib/grpc/server/transcode.ex), all three clauses use Map.merge/2 with path bindings as the first argument, giving them the lowest merge precedence. A request such as GET /users/me/profi
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:cc419a27755ea336607bb84aa0bdae9e61e8b2d68c6e8970c4b192aae417d573
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

affected · 2 assertions

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.GRPC.Server.Transcode'"],"packageName":"grpc","packageURL":"pkg:hex/grpc","product":"grpc","programFiles":["lib/grpc/server/transcode.ex"],"programRoutines":[{"name":"'Elixir.GRPC.Server.Transcode':map_request/5"}],"repo":"https://github.com/elixir-grpc/grpc","vendor":"elixir-grpc","versions":[{"lessThan":"1.0.0","status":"affected","version":"0.8.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/affected/0

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.GRPC.Server.Transcode'"],"packageName":"elixir-grpc/grpc","packageURL":"pkg:github/elixir-grpc/grpc","product":"grpc","programFiles":["lib/grpc/server/transcode.ex"],"programRoutines":[{"name":"'Elixir.GRPC.Server.Transcode':map_request/5"}],"repo":"https://github.com/elixir-grpc/grpc","vendor":"elixir-grpc","versions":[{"lessThan":"33b6a095dbc91c6dee3c7b90893d7d74952e82e4","status":"affected","version":"8aaf3d3a8c4c7b08ac65e9c6f254e0d24da1d048","versionT…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.GRPC.Server.Transcode'"],"packageName":"grpc","packageURL":"pkg:hex/grpc","product":"grpc","programFiles":["lib/grpc/server/transcode.ex"],"programRoutines":[{"name":"'Elixir.GRPC.Server.Transcode':map_request/5"}],"repo":"https://github.com/elixir-grpc/grpc","vendor":"elixir-grpc","versions":[{"lessThan":"1.0.0","status":"affected","version":"0.8.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/affected/0
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.GRPC.Server.Transcode'"],"packageName":"elixir-grpc/grpc","packageURL":"pkg:github/elixir-grpc/grpc","product":"grpc","programFiles":["lib/grpc/server/transcode.ex"],"programRoutines":[{"name":"'Elixir.GRPC.Server.Transcode':map_request/5"}],"repo":"https://github.com/elixir-grpc/grpc","vendor":"elixir-grpc","versions":[{"lessThan":"33b6a095dbc91c6dee3c7b90893d7d74952e82e4","status":"affected","version":"8aaf3d3a8c4c7b08ac65e9c6f254e0d24da1d048","versionT…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":7.6,"baseSeverity":"HIGH","privilegesRequired":"LOW","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-639","description":"CWE-639 Authorization Bypass Through User-Controlled Key","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-48599.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/elixir-grpc/grpc/commit/33b6a095dbc91c6dee3c7b90893d7d74952e82e4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-mwr4-5g34-j5cq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/elixir-grpc/grpc/security/advisories/GHSA-mwr4-5g34-j5cq"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/adp/0/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-48599"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e6f008a58748d9631136eaf5e7b2cf8fd06dfe496d977fa60d61b924ad52536b · sha256:23f99136dee57ac9… · /containers/cna/references/2

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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