StackPrism

PyPI package

aiohttp 3.14.1 vulnerabilities, and the version that fixes all of them

aiohttp 3.14.1 has 3 known vulnerabilities (1 rated high or critical); 3.14.3 fixes all of them.

PyPI (opens in a new tab) describes it as “Async http client/server framework (asyncio)”

Known vulnerabilities
3
1 rated high or critical
Released
Jun 7, 2026
Latest is 3.14.5
Licence
Apache-2.0 AND MIT
OpenSSF Scorecard
7.3/10
aio-libs/aiohttp (opens in a new tab)
Pulls in
8 packages
Resolved by deps.dev

What to upgrade to

3.14.3 is the closest release with no known vulnerabilities.

  • 3.14.3Upgrade to this

    Fixes all 3 known vulnerabilities. Released Jul 23, 2026.

    No known vulnerabilities

  • 3.14.5

    Newest 3.x release and the latest release. Released Oct 11, 2026.

    No known vulnerabilities

3.14.3 came out on Jul 23, 2026. A coding agent trained before then doesn’t know it exists, so it may suggest an older release. AI knowledge cutoff dates

Hand the fix to your coding agent

One task with the upgrade, the file to change and why. Paste it into Claude Code, Cursor or Codex.

Findings

Every advisory for aiohttp 3.14.1

Known exploited first (CISA KEV), then by how likely they are to be exploited (FIRST EPSS), then by severity. Each id links to its OSV.dev record.

  1. CriticalCVE-2026-69244 on OSV.dev (opens in a new tab)GHSA-cq5v-8q36-5273EPSS: top 57%

    AIOHTTP: Out-of-bounds heap read in C HTTP response parser error path (malformed chunked response)

    Fixed in 3.14.3. Published Aug 3, 2026.

  2. WarningCVE-2026-59881 on OSV.dev (opens in a new tab)GHSA-mq44-7p77-q5h7EPSS: top 57%

    AIOHTTP: WebSocket client accepts compressed frames without negotiated permessage-deflate

    Fixed in 3.14.2. Published Aug 3, 2026.

  3. WarningCVE-2026-69243 on OSV.dev (opens in a new tab)GHSA-mfx4-hv73-q22vEPSS: top 63%

    AIOHTTP: HTTP request smuggling via WebSocket upgrade

    Fixed in 3.14.2. Published Aug 3, 2026.

Is aiohttp the only one?

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How this page is checked

StackPrism asks OSV.dev which advisories affect exactly aiohttp 3.14.1, merges duplicates filed under several ids, and ranks them with CISA’s Known Exploited Vulnerabilities list and FIRST EPSS. Release dates and deprecation come from deps.dev and PyPI. No AI writes this page: every sentence comes from that data, refreshed every few hours.

Last checked against PyPI, OSV.dev, deps.dev, CISA KEV and FIRST EPSS.