HTTP Request Smuggling The advisory has been revoked - it doesn't affect any version of package netstandard-targeting-pack-2.1 (opens in a new tab)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ALMALINUX10-NETSTANDARDTARGETINGPACK21-13829544
- published4 Nov 2025
- disclosed15 Oct 2025
Introduced: 15 Oct 2025
CVE-2025-55315 (opens in a new tab)Amendment
The AlmaLinux security team deemed this advisory irrelevant for AlmaLinux:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream netstandard-targeting-pack-2.1 package and not the netstandard-targeting-pack-2.1 package as distributed by AlmaLinux.
Inconsistent interpretation of http requests ('http request/response smuggling') in ASP.NET Core allows an authorized attacker to bypass a security feature over a network.
References
- https://errata.almalinux.org/8/ALSA-2025-18148.html
- https://errata.almalinux.org/9/ALSA-2025-18149.html
- https://errata.almalinux.org/8/ALSA-2025-18150.html
- https://errata.almalinux.org/9/ALSA-2025-18151.html
- https://errata.almalinux.org/10/ALSA-2025-18152.html
- https://errata.almalinux.org/10/ALSA-2025-18153.html
- https://access.redhat.com/security/cve/CVE-2025-55315
- https://access.redhat.com/errata/RHSA-2025:18148
- https://access.redhat.com/errata/RHSA-2025:18149
- https://access.redhat.com/errata/RHSA-2025:18150
- https://access.redhat.com/errata/RHSA-2025:18151
- https://access.redhat.com/errata/RHSA-2025:18152
- https://access.redhat.com/errata/RHSA-2025:18153
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55315
- https://gist.github.com/N3mes1s/d0897c13ca199e739ecc2b562f466040
- https://andrewlock.net/understanding-the-worst-dotnet-vulnerability-request-smuggling-and-cve-2025-55315/
- https://github.com/ZemarKhos/CVE-2025-55315-PoC-Exploit
- https://www.exploit-db.com/exploits/52492