CVE-2026-1502 (GCVE-0-2026-1502)

Vulnerability from cvelistv5 – Published: 2026-04-10 17:54 – Updated: 2026-08-13 00:28
VLAI
Title
HTTP client proxy tunnel headers not validated for CR/LF
Summary
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
Severity
5.7 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 16:08 UTC
CWE
  • CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
PSF CNA under the mitre root
CNA scorecard B 80/100 over 26 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Python Software Foundation CPython Affected: 0 , < 3.10.21 (python)
Affected: 3.11.0 , < 3.11.16 (python)
Affected: 3.12.0 , < 3.12.14 (python)
Affected: 3.13.0 , < 3.13.14 (python)
Affected: 3.14.0a1 , < 3.14.5rc1 (python)
Affected: 3.15.0a1 , < 3.15.0b1 (python)
guessed Create a notification for this product.
Credits
senseicat Seth Larson
Show details on NVD website
To clipboard 

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              "url": "https://github.com/python/cpython/commit/b1cf9016335cb637c5a425032e8274a224f4b2ed"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/9e071c9b28c17f347f81b388a003d4eeb3c7a8dd"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/c00c386faa579ad71196d33408644478488e43ec"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/56b7100b04e44ea27989242b176beb8f016b2c53"
            },
            {
              "tags": [
                "patch"
              ],
              "url": "https://github.com/python/cpython/commit/58703ec1bdd1eb075e8b01a0c427683ce594dd3e"
            }
          ],
          "source": {
            "discovery": "UNKNOWN"
          },
          "title": "HTTP client proxy tunnel headers not validated for CR/LF",
          "x_generator": {
            "engine": "cvelib 1.8.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "28c92f92-d60d-412d-b760-e73465c3df22",
        "assignerShortName": "PSF",
        "cveId": "CVE-2026-1502",
        "datePublished": "2026-04-10T17:54:44.121Z",
        "dateReserved": "2026-01-27T19:10:37.711Z",
        "dateUpdated": "2026-08-13T00:28:30.757Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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