Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-55733

Allocation of Resources Without Limits or Throttling in ueberauth guardian allows denial of service via unbounded atom creation from attacker-controlled binary input. Guardian.Permissions.AtomEncoding encodes permission scopes by passing arbitrary binaries to String.to_atom/1. When encode/3 in lib/guardian/permissions/atom_encoding.ex is called with a list, each binary entry is handled by the encode_value/3 binary clause, which calls String.to_atom(value) with no allow-list check. The perm_set
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:3f10c089dfd6cc09b9675bdaf99d45a5d4cb7f30c6e53031b1d69d250f38ea2c
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://github.com","cpes":["cpe:2.3:a:ueberauth:guardian:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Guardian.Permissions.AtomEncoding'"],"packageName":"ueberauth/guardian","packageURL":"pkg:github/ueberauth/guardian","product":"guardian","programFiles":["lib/guardian/permissions/atom_encoding.ex"],"programRoutines":[{"name":"'Elixir.Guardian.Permissions.AtomEncoding':encode/3"},{"name":"'Elixir.Guardian.Permissions.AtomEncoding':encode_value/3"}],"repo":"https://github.com/ueberauth/guardian","vendor":"ueberauth","versions":[{"lessThan":"9cd268557846a…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /containers/cna/affected/1

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ueberauth:guardian:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Guardian.Permissions.AtomEncoding'"],"packageName":"guardian","packageURL":"pkg:hex/guardian","product":"guardian","programFiles":["lib/guardian/permissions/atom_encoding.ex"],"programRoutines":[{"name":"'Elixir.Guardian.Permissions.AtomEncoding':encode/3"},{"name":"'Elixir.Guardian.Permissions.AtomEncoding':encode_value/3"}],"repo":"https://github.com/ueberauth/guardian","vendor":"ueberauth","versions":[{"lessThan":"2.4.1","status":"affected","version…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ueberauth:guardian:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Guardian.Permissions.AtomEncoding'"],"packageName":"ueberauth/guardian","packageURL":"pkg:github/ueberauth/guardian","product":"guardian","programFiles":["lib/guardian/permissions/atom_encoding.ex"],"programRoutines":[{"name":"'Elixir.Guardian.Permissions.AtomEncoding':encode/3"},{"name":"'Elixir.Guardian.Permissions.AtomEncoding':encode_value/3"}],"repo":"https://github.com/ueberauth/guardian","vendor":"ueberauth","versions":[{"lessThan":"9cd268557846a…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /containers/cna/affected/1
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:ueberauth:guardian:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Guardian.Permissions.AtomEncoding'"],"packageName":"guardian","packageURL":"pkg:hex/guardian","product":"guardian","programFiles":["lib/guardian/permissions/atom_encoding.ex"],"programRoutines":[{"name":"'Elixir.Guardian.Permissions.AtomEncoding':encode/3"},{"name":"'Elixir.Guardian.Permissions.AtomEncoding':encode_value/3"}],"repo":"https://github.com/ueberauth/guardian","vendor":"ueberauth","versions":[{"lessThan":"2.4.1","status":"affected","version…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /containers/cna/affected/0

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:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /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:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-55733.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/ueberauth/guardian/commit/9cd268557846aa4c3ad53566c08f2c190ee5513f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /containers/cna/references/3
{"tags":["vendor-advisory","related"],"url":"https://github.com/ueberauth/guardian/security/advisories/GHSA-fjr5-7xrc-hmpj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/ueberauth/guardian/security/advisories/GHSA-fjr5-7xrc-hmpj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /containers/adp/0/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-55733"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:274c843282220bf35c80d1c369269ae9df60f26aee51a23c9592eacce798c10a · sha256:050f4d5365e9982f… · /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.

← Back to CVE Explorer