CVE-2025-1861: Stream HTTP wrapper truncates redirect location to 1024 bytes
Fixed (Stream HTTP wrapper truncate redirect location to 1024 bytes). (CVE-2025-1861)
Other sources
In PHP from 8.1. before 8.1.32, from 8.2. before 8.2.28, from 8.3. before 8.3.19, from 8.4. before 8.4.5, when parsing HTTP redirect in the response to an HTTP request, there is currently limit on the location value size caused by limited size of the location buffer to 1024. However as per RFC9110, the limit is recommended to be 8000. This may lead to incorrect URL truncation and redirecting to a wrong location.
— Debian
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2025-1861?
CVE-2025-1861 has been classified as a moderate severity vulnerability.
How do I fix CVE-2025-1861?
To fix CVE-2025-1861, update PHP to version 8.3.19 or later.
What does CVE-2025-1861 affect?
CVE-2025-1861 affects PHP versions up to 8.3.19.
What is the nature of the vulnerability in CVE-2025-1861?
CVE-2025-1861 addresses a security issue that allows the truncation of HTTP redirect locations to 1024 bytes.
Is there a workaround for CVE-2025-1861?
There is no official workaround for CVE-2025-1861; updating to the fixed version is recommended.