AIOHTTP vulnerable to denial of service through large payloads

Summary A request can be crafted in such a way that an aiohttp server's memory fills up uncontrollably during processing. Impact If an application includes a handler that uses the Request.post method, an attacker may be able to freeze the server by exhausting the memory. ----- Patch:...

GHSA-JJ3X-WXRX-4X23 AIOHTTP vulnerable to DoS when bypassing asserts

Summary When assert statements are bypassed, an infinite loop can occur, resulting in a DoS attack when processing a POST body. Impact If optimisations are enabled -O or PYTHONOPTIMIZE=1, and the application includes a handler that uses the Request.post method, then an attacker may be able to...

Infinite loop

Overview Affected versions of this package are vulnerable to Infinite loop in the Request.post function. An attacker can cause the application to exhaust system resources by sending a POST request. Note: This is only exploitable if Python optimizations are enabled using the -O flag or setting...

a-mailx (=0.1.0), aba-cli-scrapper (>=0.1.1 <=0.1.6) +1139 more potentially affected by CVE-2025-69227 via aiohttp (>=3.0.0b0 <=3.13.2)

aiohttp PYPI version =3.0.0b0, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.0.0, =0.0.2, =4.8.2, =0.0.3, =0.1.3, =0.4.0, =56.0.0, =0.1.0, =0.1.31, =0.1.37 and more Source cves: CVE-2025-69227 Source advisory: SNYK:PYTHON-AIOHTTP-14871979...

EUVD-2026-1045

AIOHTTP vulnerable to DoS when bypassing asserts...

AIOHTTP vulnerable to DoS when bypassing asserts

Summary When assert statements are bypassed, an infinite loop can occur, resulting in a DoS attack when processing a POST body. Impact If optimisations are enabled -O or PYTHONOPTIMIZE=1, and the application includes a handler that uses the Request.post method, then an attacker may be able to...

GHSA-54JQ-C3M8-4M76 AIOHTTP vulnerable to brute-force leak of internal static file path components

Summary Path normalization for static files prevents path traversal, but opens up the ability for an attacker to ascertain the existence of absolute path components. Impact If an application uses web.static not recommended for production deployments, it may be possible for an attacker to ascertai...

a-mailx (=0.1.0), aba-cli-scrapper (>=0.1.1 <=0.1.6) +1139 more potentially affected by CVE-2025-69226 via aiohttp (>=3.0.0b0 <=3.13.2)

aiohttp PYPI version =3.0.0b0, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.0.0, =0.0.2, =4.8.2, =0.0.3, =0.1.3, =0.4.0, =56.0.0, =0.1.0, =0.1.31, =0.1.37 and more Source cves: CVE-2025-69226 Source advisory: SNYK:PYTHON-AIOHTTP-14871888...

AIOHTTP vulnerable to brute-force leak of internal static file path components

Summary Path normalization for static files prevents path traversal, but opens up the ability for an attacker to ascertain the existence of absolute path components. Impact If an application uses web.static not recommended for production deployments, it may be possible for an attacker to ascertai...

Information Exposure

Overview Affected versions of this package are vulnerable to Information Exposure over the /static endpoint. An attacker can determine the existence of internal path components by sending requests to probe for absolute path elements. Remediation Upgrade aiohttp to version 3.13.3 or higher...

EUVD-2026-1046

AIOHTTP vulnerable to brute-force leak of internal static file path components...

EUVD-2026-1047

AIOHTTP has unicode match groups in regexes for ASCII protocol elements...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling via the parsing of Range headers. An attacker can potentially interfere with HTTP request processing by supplying non-ASCII decimals in the header, which may lead to unexpected parser mismatches. Remediation Upgra...

AIOHTTP has unicode match groups in regexes for ASCII protocol elements

Summary The parser allows non-ASCII decimals to be present in the Range header. Impact There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability. ---- Patch:...

GHSA-MQQC-3GQH-H2X8 AIOHTTP has unicode match groups in regexes for ASCII protocol elements

Summary The parser allows non-ASCII decimals to be present in the Range header. Impact There is no known impact, but there is the possibility that there's a method to exploit a request smuggling vulnerability. ---- Patch:...

a-mailx (=0.1.0), aba-cli-scrapper (>=0.1.1 <=0.1.6) +1139 more potentially affected by CVE-2025-69225 via aiohttp (>=3.0.0b0 <=3.13.2)

aiohttp PYPI version =3.0.0b0, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.0.0, =0.0.2, =4.8.2, =0.0.3, =0.1.3, =0.4.0, =56.0.0, =0.1.0, =0.1.31, =0.1.37 and more Source cves: CVE-2025-69225 Source advisory: SNYK:PYTHON-AIOHTTP-14871929...

HTTP Request Smuggling

Overview Affected versions of this package are vulnerable to HTTP Request Smuggling via the unicode processing of HTTP header values. An attacker can bypass firewall or proxy protections by sending requests containing non-ASCII characters. Note: This is only exploitable if C extensions are not in...

EUVD-2026-1048

AIOHTTP's unicode processing of header values could cause parsing discrepancies...

a-mailx (=0.1.0), aba-cli-scrapper (>=0.1.1 <=0.1.6) +1139 more potentially affected by CVE-2025-69224 via aiohttp (>=3.0.0b0 <=3.13.2)

aiohttp PYPI version =3.0.0b0, =0.1.1, =0.1.0b0, =1.1.0, =1.0.1, =0.0.0, =0.0.2, =4.8.2, =0.0.3, =0.1.3, =0.4.0, =56.0.0, =0.1.0, =0.1.31, =0.1.37 and more Source cves: CVE-2025-69224 Source advisory: SNYK:PYTHON-AIOHTTP-14871873...

GHSA-69F9-5GXW-WVC2 AIOHTTP's unicode processing of header values could cause parsing discrepancies

Summary The Python HTTP parser may allow a request smuggling attack with the presence of non-ASCII characters. Impact If a pure Python version of aiohttp is installed i.e. without the usual C extensions or AIOHTTPNOEXTENSIONS is enabled, then an attacker may be able to execute a request smuggling...