CVSS 4.0
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката може да се автоматизира
Описание
Оригинално описание
urllib3 is an HTTP client library for Python. From 2.6.2 until 2.8.0, HTTPResponse.stream and HTTPResponse.read_chunked can enter an infinite loop because the Deflate decoder retains trailing bytes as unconsumed input after reaching end-of-stream and repeatedly decodes them without progress. The issue occurs when an untrusted server sends a chunked Deflate response whose decoded body exceeds a positive finite chunk size and whose encoded body has trailing bytes, specifically a response with Transfer-Encoding: chunked and Content-Encoding: deflate, content decoding enabled, and the positive finite amt=N streaming chunk size. The attack mechanism is that a malicious server returns a compressed chunked response with trailing bytes after the Deflate stream. The impact is excessive CPU usage and a request that does not complete, and network read timeouts do not interrupt the loop because no further socket read occurs. This issue is fixed in version 2.8.0.
Засегнати продукти
- urllib3 urllib3: >= 2.6.2, < 2.8.0
Вид слабост
История
- 29 септември 2026 Публикувано
Други уязвимости в urllib3 urllib3
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-97688
- https://nvd.nist.gov/vuln/detail/CVE-2026-97688
- https://github.com/urllib3/urllib3/security/advisories/GHSA-gh4c-6fx4-qh6g
- https://github.com/urllib3/urllib3/commit/ea2ad7b21a80da3632f80016526a18864586077f
- https://github.com/urllib3/urllib3/releases/tag/2.8.0