CVE-2026-1502
HTTP client proxy tunnel headers not validated for CR/LF
Description
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
INFO
Published Date :
April 10, 2026, 6:16 p.m.
Last Modified :
June 4, 2026, 3:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-1502
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 4.0 | MEDIUM | 28c92f92-d60d-412d-b760-e73465c3df22 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Configure proxy to reject CR/LF bytes in headers.
- Update HTTP client to sanitize header input.
- Validate all header inputs for control characters.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-1502.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-1502 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-1502
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-1502 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-1502 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Jun. 04, 2026
Action Type Old Value New Value Added Reference https://github.com/python/cpython/commit/9e071c9b28c17f347f81b388a003d4eeb3c7a8dd Added Reference https://github.com/python/cpython/commit/c00c386faa579ad71196d33408644478488e43ec -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 10, 2026
Action Type Old Value New Value Added CWE CWE-93 -
CVE Modified by [email protected]
Apr. 21, 2026
Action Type Old Value New Value Added Reference https://github.com/python/cpython/commit/b1cf9016335cb637c5a425032e8274a224f4b2ed -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Apr. 11, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/04/11/4 -
New CVE Received by [email protected]
Apr. 10, 2026
Action Type Old Value New Value Added Description CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host. Added CVSS V4.0 AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added Reference https://github.com/python/cpython/commit/05ed7ce7ae9e17c23a04085b2539fe6d6d3cef69 Added Reference https://github.com/python/cpython/issues/146211 Added Reference https://github.com/python/cpython/pull/146212 Added Reference https://mail.python.org/archives/list/[email protected]/thread/2IVPAEQWUJBCTQZEJEVTYCIKSMQPGRZ3/