CVE Explorer

CVE-2026-47066

Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in benoitc hackney allows Excessive Allocation. The Alt-Svc response header parser in src/hackney_altsvc.erl does not guarantee forward progress. When parse_token/2 receives a non-token, non-whitespace, non-comma byte (e.g. !, @, =, ;), it returns the input unchanged. skip_comma/1 also returns the buffer unchanged when the first byte is not a comma. parse_entries/2 then recurses with identical data, creating a tight infinite ta

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8b532e33eddc66a974d293bc82363660684d17e5339b1aa7228abfadae092240

Known exploited

Not asserted

Disputed

Stale source

Conflicts

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:benoitc:hackney:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["hackney_altsvc"],"packageName":"hackney","packageURL":"pkg:hex/hackney","product":"hackney","programFiles":["src/hackney_altsvc.erl"],"programRoutines":[{"name":"hackney_altsvc:parse_entries/2"},{"name":"hackney_altsvc:parse_entry/1"},{"name":"hackney_altsvc:parse_protocol/1"},{"name":"hackney_altsvc:parse_token/2"},{"name":"hackney_altsvc:skip_comma/1"}],"repo":"https://github.com/benoitc/hackney","vendor":"benoitc","versions":[{"lessThan":"4.0.1","status":"affe…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/cna/affected/0

{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:benoitc:hackney:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["hackney_altsvc"],"packageName":"benoitc/hackney","packageURL":"pkg:github/benoitc/hackney","product":"hackney","programFiles":["src/hackney_altsvc.erl"],"programRoutines":[{"name":"hackney_altsvc:parse_entries/2"},{"name":"hackney_altsvc:parse_entry/1"},{"name":"hackney_altsvc:parse_protocol/1"},{"name":"hackney_altsvc:parse_token/2"},{"name":"hackney_altsvc:skip_comma/1"}],"repo":"https://github.com/benoitc/hackney","vendor":"benoitc","versions":[{"lessThan":"e54…

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/cna/affected/1

Affected products and versions

2 source assertions

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/cna/affected/0

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/cna/affected/1

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion

{"cweId":"CWE-835","description":"CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions

{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-47066.html"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/cna/references/1

{"tags":["patch"],"url":"https://github.com/benoitc/hackney/commit/e548aba1f97ffa3f4750da7b772998fb78c01894"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/cna/references/3

{"tags":["vendor-advisory","related"],"url":"https://github.com/benoitc/hackney/security/advisories/GHSA-6cp8-v795-jr2j"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/cna/references/0

{"tags":["exploit"],"url":"https://github.com/benoitc/hackney/security/advisories/GHSA-6cp8-v795-jr2j"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /containers/adp/0/references/0

{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-47066"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:4845923ebe7618ae1e45e87e3e6e59e2871062f746d270771ce557e25cf02ff1 · sha256:c6ff904343999218… · /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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