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CVE-2026-49753

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in elixir-mint Mint allows attacker-controlled HTTP/1 servers to desynchronise response framing on shared connections. Mint's HTTP/1 Content-Length parser, Mint.HTTP1.Parse.content_length_header/1 in lib/mint/http1/parse.ex, parses the header value with Integer.parse/1, which accepts an optional + or - sign prefix. The length >= 0 guard rejects negatives, but inputs such as +0 or +123 are returned as
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:7d84f1ac58dc66d23fa185d4a7be61239a5b79315a526333454b860350afd5bd
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:elixir-mint:mint:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Mint.HTTP1.Parse'"],"packageName":"elixir-mint/mint","packageURL":"pkg:github/elixir-mint/mint","product":"mint","programFiles":["lib/mint/http1/parse.ex"],"programRoutines":[{"name":"'Elixir.Mint.HTTP1.Parse':content_length_header/1"}],"repo":"https://github.com/elixir-mint/mint.git","vendor":"elixir-mint","versions":[{"lessThan":"47e48027480228e4e32a0b4df39db497b4804921","status":"affected","version":"65e0e86d799a6d3b08e4372fccdd9747535e0dd6","versionTy…

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/cna/affected/1

{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Mint.HTTP1.Parse'"],"packageName":"mint","packageURL":"pkg:hex/mint","product":"mint","programFiles":["lib/mint/http1/parse.ex"],"programRoutines":[{"name":"'Elixir.Mint.HTTP1.Parse':content_length_header/1"}],"repo":"https://github.com/elixir-mint/mint","vendor":"elixir-mint","versions":[{"lessThan":"1.9.0","status":"affected","version":"0.1.0","versionType":"semver"}]}

  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/cna/affected/0

Affected products and versions

2 source assertions
{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Mint.HTTP1.Parse'"],"packageName":"elixir-mint/mint","packageURL":"pkg:github/elixir-mint/mint","product":"mint","programFiles":["lib/mint/http1/parse.ex"],"programRoutines":[{"name":"'Elixir.Mint.HTTP1.Parse':content_length_header/1"}],"repo":"https://github.com/elixir-mint/mint.git","vendor":"elixir-mint","versions":[{"lessThan":"47e48027480228e4e32a0b4df39db497b4804921","status":"affected","version":"65e0e86d799a6d3b08e4372fccdd9747535e0dd6","versionTy…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/cna/affected/1
{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:elixir-mint:mint:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Mint.HTTP1.Parse'"],"packageName":"mint","packageURL":"pkg:hex/mint","product":"mint","programFiles":["lib/mint/http1/parse.ex"],"programRoutines":[{"name":"'Elixir.Mint.HTTP1.Parse':content_length_header/1"}],"repo":"https://github.com/elixir-mint/mint","vendor":"elixir-mint","versions":[{"lessThan":"1.9.0","status":"affected","version":"0.1.0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":6.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-444","description":"CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-49753.html"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/cna/references/1
{"tags":["patch"],"url":"https://github.com/elixir-mint/mint/commit/47e48027480228e4e32a0b4df39db497b4804921"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/cna/references/3
{"tags":["exploit"],"url":"https://github.com/elixir-mint/mint/security/advisories/GHSA-mjqx-c6f6-7rc2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/adp/0/references/0
{"tags":["vendor-advisory","related"],"url":"https://github.com/elixir-mint/mint/security/advisories/GHSA-mjqx-c6f6-7rc2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /containers/cna/references/0
{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-49753"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:b749d8c05b4378bfcf12a715aaeecbaea8fa6e8a004d0458b8d7641d94f7da14 · sha256:55269ce016f67c65… · /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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