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CVE-2026-43973

Uncontrolled Resource Consumption vulnerability in ninenines gun (gun_http module) allows a malicious server to exhaust client memory via unbounded HTTP/1.1 response buffering. In gun_http:handle/5, three clauses accumulate incoming TCP data into the connection's buffer field using binary concatenation with no upper-bound check: the head clause appends data until the \r\n\r\n header terminator is found; the body_chunked clause appends data whenever cow_http_te:stream_chunked/2 returns a more re
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bcd12320b75a8a4b0cf18297dd97241fef08f275b05fbeaffe7dc641782adf7b
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:ninenines:gun:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["gun_http"],"packageName":"ninenines/gun","packageURL":"pkg:github/ninenines/gun","product":"gun","programFiles":["src/gun_http.erl"],"programRoutines":[{"name":"gun_http:handle/5"}],"repo":"https://github.com/ninenines/gun.git","vendor":"ninenines","versions":[{"lessThan":"f3e7e0568b3c4cf9fa4bea79d5116e67ce76ad25","status":"affected","version":"11dfe71f4b9aedaaedea2ad3b2f32fd006a8480f","versionType":"git"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bb3ca114a46c5dcd0868e89ea3e3afe932f7dec959cd34cd59dda4466191a9fa · sha256:0c61144bd2961172… · /containers/cna/affected/1

{"cpes":["cpe:2.3:a:ninenines:gun:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["gun_http"],"packageName":"gun","packageURL":"pkg:hex/gun","product":"gun","programFiles":["src/gun_http.erl"],"programRoutines":[{"name":"gun_http:handle/5"}],"repo":"https://github.com/ninenines/gun","vendor":"ninenines","versions":[{"lessThan":"2.4.0","status":"affected","version":"1.0.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bb3ca114a46c5dcd0868e89ea3e3afe932f7dec959cd34cd59dda4466191a9fa · sha256:0c61144bd2961172… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:ninenines:gun:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["gun_http"],"packageName":"ninenines/gun","packageURL":"pkg:github/ninenines/gun","product":"gun","programFiles":["src/gun_http.erl"],"programRoutines":[{"name":"gun_http:handle/5"}],"repo":"https://github.com/ninenines/gun.git","vendor":"ninenines","versions":[{"lessThan":"f3e7e0568b3c4cf9fa4bea79d5116e67ce76ad25","status":"affected","version":"11dfe71f4b9aedaaedea2ad3b2f32fd006a8480f","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bb3ca114a46c5dcd0868e89ea3e3afe932f7dec959cd34cd59dda4466191a9fa · sha256:0c61144bd2961172… · /containers/cna/affected/1
{"cpes":["cpe:2.3:a:ninenines:gun:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["gun_http"],"packageName":"gun","packageURL":"pkg:hex/gun","product":"gun","programFiles":["src/gun_http.erl"],"programRoutines":[{"name":"gun_http:handle/5"}],"repo":"https://github.com/ninenines/gun","vendor":"ninenines","versions":[{"lessThan":"2.4.0","status":"affected","version":"1.0.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:bb3ca114a46c5dcd0868e89ea3e3afe932f7dec959cd34cd59dda4466191a9fa · sha256:0c61144bd2961172… · /containers/cna/affected/0

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:bb3ca114a46c5dcd0868e89ea3e3afe932f7dec959cd34cd59dda4466191a9fa · sha256:0c61144bd2961172… · /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:bb3ca114a46c5dcd0868e89ea3e3afe932f7dec959cd34cd59dda4466191a9fa · sha256:0c61144bd2961172… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"tags":["related","third-party-advisory"],"url":"https://cna.erlef.org/cves/CVE-2026-43973.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bb3ca114a46c5dcd0868e89ea3e3afe932f7dec959cd34cd59dda4466191a9fa · sha256:0c61144bd2961172… · /containers/cna/references/0
{"tags":["patch"],"url":"https://github.com/ninenines/gun/commit/f3e7e0568b3c4cf9fa4bea79d5116e67ce76ad25"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bb3ca114a46c5dcd0868e89ea3e3afe932f7dec959cd34cd59dda4466191a9fa · sha256:0c61144bd2961172… · /containers/cna/references/2
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-43973"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:bb3ca114a46c5dcd0868e89ea3e3afe932f7dec959cd34cd59dda4466191a9fa · sha256:0c61144bd2961172… · /containers/cna/references/1

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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