UpHeron
All vulnerabilities

Servers and applications

CVE-2025-13836

When reading an HTTP response from a server, if no read amount is specified, the default behavior will be to use Content-Length. This allows a malicious server to cause the client to read large amounts of data into memory, potentially causing OOM or other DoS.

Severity
Medium 6.3
Published
1 Dec 2025
Last changed
3 Sept 2026
Added to UpHeron
21 Oct 2026
Fixed in
3.10.20, 3.11.15, 3.12.13, 3.13.11
Sources
NVD

Affected software

SoftwareAffected versions
PythonServers and applications · cpe:a:python:python
  • Version 3.15.0-alpha2
  • Version 3.15.0-alpha1
  • Version 3.14.0
  • From 3.13.0 before 3.13.11
All 7 release lines
  • Every version before 3.10.20
  • From 3.11.0 before 3.11.15
  • From 3.12.0 before 3.12.13
  • From 3.13.0 before 3.13.11
  • Version 3.14.0
  • Version 3.15.0-alpha1
  • Version 3.15.0-alpha2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-13836
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-13836