SB2026072362 - Ubuntu update for python-aiohttp
Published: July 23, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 vulnerabilities.
1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-22815)
CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to allocation of resources without limits or throttling in header/trailer handling when processing an attacker-controlled request or response. A remote attacker can send a specially crafted request or response to cause a denial of service.
2) Resource exhaustion (CVE-ID: CVE-2026-34513)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in TCPConnector DNS cache when handling requests to a very large number of hosts. A remote attacker can cause an application to make requests to many different hosts to cause a denial of service.
3) CRLF injection (CVE-ID: CVE-2026-34514)
CWE-ID: CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to inject extra headers into a multipart request.
The vulnerability exists due to improper neutralization of carriage return and line feed characters in multipart part content type header construction when constructing a multipart request with an attacker-controlled content_type parameter. A remote attacker can supply a crafted content_type value to inject extra headers into a multipart request.
The issue occurs if an application uses untrusted data for the multipart content_type parameter while constructing a request.
4) Input validation error (CVE-ID: CVE-2026-34516)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in multipart header processing when parsing a response with an excessive number of multipart headers. A remote attacker can send a specially crafted response to cause a denial of service.
Other restrictions in place limit the impact of this vulnerability.
Remediation
Install update from vendor's website.