AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0, cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect. If a developer uses the `cookies` parameter on a per-request basis then sensitive data might be leaked to an attacker if they manage to control a redirect. Version 3.14.0 patches the issue. If unable to upgrade, using a `Cookie` header in the `headers` parameter is not vulnerable.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3207-1 advisory.

    This update for python-aiohttp fixes the following issues

    - CVE-2026-22815: insufficient restrictions in header/trailer handling can cause uncapped memory usage and     a denial of       service (bsc#1261320).
    - CVE-2026-34513: unbounded DNS cache can cause a excessive memory usage and lead to a denial of service     (bsc#1261321).
    - CVE-2026-34514: `content_type` parameter manipulation can lead to header injection (bsc#1261322).
    - CVE-2026-34516: response with excessive multipart headers can use more memory than intended and cause a     denial of       service (bsc#1261329).
    - CVE-2026-34517: large multipart form fields read into memory without size check can cause a denial of     service       (bsc#1261331).
    - CVE-2026-34518: retained `Cookie` and `Proxy-Authorization` headers when following redirects can lead to     information       disclosure (bsc#1261332).
    - CVE-2026-34519: response `reason` parameter can be use to perform header injection (bsc#1261334).
    - CVE-2026-34520: improper character handling by C parser can lead to header injection (bsc#1261335).
    - CVE-2026-34525: multiple `Host` headers allow for potential security bypass in proxy servers     (bsc#1261343).
    - CVE-2026-34993: loading untrusted input in `CookieJar.load()` can lead to arbitrary code execution     (bsc#1267471).
    - CVE-2026-47265: cookies set with the `cookies` parameter on requests are sent after following a cross-     origin redirect       and can leak sensitive data (bsc#1267561).
    - CVE-2026-50269: improper validation of user-controlled strings allows for CRLF injection in multipart     headers       (bsc#1268398).
    - CVE-2026-54273: no limit in the HTTP/1 pipelined request queue can lead to excessive resource     consumption       (bsc#1268543).
    - CVE-2026-54274: incomplete websocket frame payloads can bypass memory use limits and cause a DoS via     excessive       resource consumption (bsc#1268544).
    - CVE-2026-54275: `server_hostname` TLS SNI check bypass when an existing connection is reused     (bsc#1268549).
    - CVE-2026-54277: `max_line_size` bypass when using the optimised C HTTP parser can lead to excessive     resource       consumption (bsc#1268556).
    - CVE-2026-54278: unread compressed request bodies can bypass `client_max_size` during cleanup and cause a     DoS       (bsc#1268559).
    - CVE-2026-54279: host-only cookies become domain cookies after `CookieJar` persistence (bsc#1268560).
    - CVE-2026-54280: payload resources are not closed correctly when a client disconnects in the middle of a     write and       can cause resource starvation (bsc#1268561).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3059-1 advisory.

    This update for python-aiohttp fixes the following issues

    - CVE-2026-22815: insufficient header/trailer handling can cause a denial of service (bsc#1261320).
    - CVE-2026-34513: unbounded DNS cache can cause a denial of service (bsc#1261321).
    - CVE-2026-34514: content_type parameter manipulation can lead to header Injection (bsc#1261322).
    - CVE-2026-34516: excessive multipart headers can cause a denial of service (bsc#1261329).
    - CVE-2026-34517: large multipart form fields can cause a denial of service (bsc#1261331).
    - CVE-2026-34518: retained Cookie and Proxy-Authorization headers during redirects can lead to information     disclosure (bsc#1261332).
    - CVE-2026-34519: reason parameter can be use to perform header injection (bsc#1261334).
    - CVE-2026-34520: improper character handling can lead to header injection (bsc#1261335).
    - CVE-2026-34525: multiple Host headers can potentially lead to security bypass (bsc#1261343).
    - CVE-2026-34993: arbitrary code execution via loading untrusted input in CookieJar.load() (bsc#1267471).
    - CVE-2026-47265: cookies set with the `cookies` parameter on requests are sent after following a cross-     origin redirect (bsc#1267561).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES16 / SLES_SAP16 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:22173-1 advisory.

    This update for python-aiohttp fixes the following issues

    - CVE-2026-22815: insufficient header/trailer handling can cause a denial of service (bsc#1261320).
    - CVE-2026-34513: unbounded DNS cache can cause a denial of service (bsc#1261321).
    - CVE-2026-34514: content_type parameter manipulation can lead to header Injection (bsc#1261322).
    - CVE-2026-34516: excessive multipart headers can cause a denial of service (bsc#1261329).
    - CVE-2026-34517: large multipart form fields can cause a denial of service (bsc#1261331).
    - CVE-2026-34518: retained Cookie and Proxy-Authorization headers during redirects can lead to information     disclosure       (bsc#1261332).
    - CVE-2026-34519: reason parameter can be use to perform header injection (bsc#1261334).
    - CVE-2026-34520: improper character handling can lead to header injection (bsc#1261335).
    - CVE-2026-34525: multiple Host headers can potentially lead to security bypass (bsc#1261343).
    - CVE-2026-34993: arbitrary code execution via loading untrusted input in CookieJar.load() (bsc#1267471).
    - CVE-2026-47265: cookies set with the `cookies` parameter on requests are sent after following a cross-     origin redirect       (bsc#1267561).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of aioHTTP installed on the remote host is prior to 3.14.0. It is, therefore, affected by multiple vulnerabilities:

  - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0,     using CookieJar.load() with untrusted input may allow arbitrary code execution. Most applications using     this function will be doing so with the user's own data, so this is unlikely to affect many applications.
    Version 3.14.0 patches the issue. If an application does allow attacker controlled files to be loaded, a     workaround on older releases would be to sanitize the files before loading. (CVE-2026-34993)

  - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0,     cookies set with the cookies parameter on requests are sent after following a cross-origin redirect. If a     developer uses the cookies parameter on a per-request basis then sensitive data might be leaked to an     attacker if they manage to control a redirect. Version 3.14.0 patches the issue. If unable to upgrade,     using a Cookie header in the headers parameter is not vulnerable. (CVE-2026-47265)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0,
    cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect. If
    a developer uses the `cookies` parameter on a per-request basis then sensitive data might be leaked to an
    attacker if they manage to control a redirect. Version 3.14.0 patches the issue. If unable to upgrade,
    using a `Cookie` header in the `headers` parameter is not vulnerable. (CVE-2026-47265)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to version 3.14.0,     cookies set with the `cookies` parameter on requests are sent after following a cross-origin redirect. If     a developer uses the `cookies` parameter on a per-request basis then sensitive data might be leaked to an     attacker if they manage to control a redirect. Version 3.14.0 patches the issue. If unable to upgrade,     using a `Cookie` header in the `headers` parameter is not vulnerable. (CVE-2026-47265)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
329280	SUSE SLED15 / SLES15 Security Update : python-aiohttp (SUSE-SU-2026:3207-1)	Nessus	SuSE Local Security Checks	high
327318	SUSE SLES15 Security Update : python-aiohttp (SUSE-SU-2026:3059-1)	Nessus	SuSE Local Security Checks	high
323099	SUSE SLES16 Security Update : python-aiohttp (SUSE-SU-2026:22173-1)	Nessus	SuSE Local Security Checks	high
320552	aioHTTP < 3.14.0 Multiple Vulnerabilities	Nessus	Misc.	high
442598	SCA: security update for aiohttp (GHSA-hg6j-4rv6-33pg)	Tenable Cloud Security	SCA Checks	high
442598	SCA: security update for aiohttp (GHSA-hg6j-4rv6-33pg)	Tenable Self-Hosted Container Security	SCA Checks	high
318373	Linux Distros Unpatched Vulnerability : CVE-2026-47265	Nessus	Misc.	high

Detections

Analytics

CVE-2026-47265

high

Tenable Plugins

high

high

high

high

high

high

high