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CVE-2026-55734

Allocation of Resources Without Limits or Throttling vulnerability in ueberauth guardian (Guardian.Permissions module) allows a denial of service via BEAM atom-table exhaustion. This vulnerability is associated with program file lib/guardian/permissions.ex and program routines 'Elixir.Guardian.Permissions':encode_permissions!/1, 'Elixir.Guardian.Permissions':encode_permissions_into_claims!/2, 'Elixir.Guardian.Permissions':do_encode_permissions!/2. The Guardian.Permissions mixin installs a publ
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:76380ac9f037445a2e5e376c50ac26c334a610205798e7238bc3ccfa9ab2bd67
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:ueberauth:guardian:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Guardian.Permissions'"],"packageName":"guardian","packageURL":"pkg:hex/guardian","product":"guardian","programFiles":["lib/guardian/permissions.ex"],"programRoutines":[{"name":"'Elixir.Guardian.Permissions':encode_permissions!/1"},{"name":"'Elixir.Guardian.Permissions':encode_permissions_into_claims!/2"},{"name":"'Elixir.Guardian.Permissions':do_encode_permissions!/2"}],"repo":"https://github.com/ueberauth/guardian","vendor":"ueberauth","versions":[{"l…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/cna/affected/0

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ueberauth:guardian:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Guardian.Permissions'"],"packageName":"ueberauth/guardian","packageURL":"pkg:github/ueberauth/guardian","product":"guardian","programFiles":["lib/guardian/permissions.ex"],"programRoutines":[{"name":"'Elixir.Guardian.Permissions':encode_permissions!/1"},{"name":"'Elixir.Guardian.Permissions':encode_permissions_into_claims!/2"},{"name":"'Elixir.Guardian.Permissions':do_encode_permissions!/2"}],"repo":"https://github.com/ueberauth/guardian","vendor":"uebe…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/cna/affected/1

Affected products and versions

2 source assertions
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ueberauth:guardian:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Guardian.Permissions'"],"packageName":"guardian","packageURL":"pkg:hex/guardian","product":"guardian","programFiles":["lib/guardian/permissions.ex"],"programRoutines":[{"name":"'Elixir.Guardian.Permissions':encode_permissions!/1"},{"name":"'Elixir.Guardian.Permissions':encode_permissions_into_claims!/2"},{"name":"'Elixir.Guardian.Permissions':do_encode_permissions!/2"}],"repo":"https://github.com/ueberauth/guardian","vendor":"ueberauth","versions":[{"l…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/cna/affected/0
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ueberauth:guardian:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Guardian.Permissions'"],"packageName":"ueberauth/guardian","packageURL":"pkg:github/ueberauth/guardian","product":"guardian","programFiles":["lib/guardian/permissions.ex"],"programRoutines":[{"name":"'Elixir.Guardian.Permissions':encode_permissions!/1"},{"name":"'Elixir.Guardian.Permissions':encode_permissions_into_claims!/2"},{"name":"'Elixir.Guardian.Permissions':do_encode_permissions!/2"}],"repo":"https://github.com/ueberauth/guardian","vendor":"uebe…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":6.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-770","description":"CWE-770 Allocation of Resources Without Limits or Throttling","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-55734.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/ueberauth/guardian/commit/8d4efbfc352d30f5fcfc75a4d69a795b0e472724"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/ueberauth/guardian/security/advisories/GHSA-9qx2-v587-q3gg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/ueberauth/guardian/security/advisories/GHSA-9qx2-v587-q3gg"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /containers/adp/0/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-55734"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2afd8223febc93a9e332d45247567d56787a17d11bf9f38131951c8702e26292 · sha256:9df43b99444cf2dc… · /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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