Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-34525

AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.13.4, multiple Host headers were allowed in aiohttp. This issue has been patched in version 3.13.4.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:6abde5bf9a7af4b3397f36820ab0daf629111a63078ccdb6057df16665223f05
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/problemTypes/0/descriptions/0

{"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:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"aiohttp","vendor":"aio-libs","versions":[{"status":"affected","version":"< 3.13.4"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","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:H/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:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/problemTypes/0/descriptions/0
{"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:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/aio-libs/aiohttp/commit/53e2e6fc58b89c6185be7820bd2c9f40216b3000","tags":["x_refsource_MISC"],"url":"https://github.com/aio-libs/aiohttp/commit/53e2e6fc58b89c6185be7820bd2c9f40216b3000"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/references/1
{"name":"https://github.com/aio-libs/aiohttp/commit/e00ca3cca92c465c7913c4beb763a72da9ed8349","tags":["x_refsource_MISC"],"url":"https://github.com/aio-libs/aiohttp/commit/e00ca3cca92c465c7913c4beb763a72da9ed8349"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/references/2
{"name":"https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4","tags":["x_refsource_MISC"],"url":"https://github.com/aio-libs/aiohttp/releases/tag/v3.13.4"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/references/3
{"name":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-c427-h43c-vf67","tags":["x_refsource_CONFIRM"],"url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-c427-h43c-vf67"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:03ec259678294d8a553252e8fce5e10037b37f7bd55d1d23c171704222e5ef2e · sha256:fa243b53c25e491a… · /containers/cna/references/0

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