{"schema_version":"1.7.2","id":"OESA-2026-2116","modified":"2026-04-25T05:51:21Z","published":"2026-04-25T05:51:21Z","upstream":["CVE-2026-1502","CVE-2026-4786","CVE-2026-6100"],"summary":"python3 security update","details":"Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems. New built-in modules are easily written in C or C++ (or other languages, depending on the chosen implementation). Python is also usable as an extension language for applications written in other languages that need easy-to-use scripting or automation interfaces.\r\n\r\nSecurity Fix(es):\n\nCR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.(CVE-2026-1502)\n\nMitgation of CVE-2026-4519 was incomplete. If the URL contained "%action" the mitigation could be bypassed for certain browser types the "webbrowser.open()" API could have commands injected into the underlying shell. See CVE-2026-4519 for details.(CVE-2026-4786)\n\nUse-after-free (UAF) was possible in the `lzma.LZMADecompressor`, `bz2.BZ2Decompressor`, and `gzip.GzipFile` when a memory allocation fails with a `MemoryError` and the decompression instance is re-used. This scenario can be triggered if the process is under memory pressure. The fix cleans up the dangling pointer in this specific error condition.\n\nThe vulnerability is only present if the program re-uses decompressor instances across multiple decompression calls even after a `MemoryError` is raised during decompression. Using the helper functions to one-shot decompress data such as `lzma.decompress()`, `bz2.decompress()`, `gzip.decompress()`, and `zlib.decompress()` are not affected as a new decompressor instance is used per call. If the decompressor instance is not re-used after an error condition, this usage is similarly not vulnerable.(CVE-2026-6100)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP3","name":"python3","purl":"pkg:rpm/openEuler/python3&distro=openEuler-24.03-LTS-SP3"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.11.6-28.oe2403sp3"}]}],"ecosystem_specific":{"aarch64":["python3-3.11.6-28.oe2403sp3.aarch64.rpm","python3-debug-3.11.6-28.oe2403sp3.aarch64.rpm","python3-debuginfo-3.11.6-28.oe2403sp3.aarch64.rpm","python3-debugsource-3.11.6-28.oe2403sp3.aarch64.rpm","python3-devel-3.11.6-28.oe2403sp3.aarch64.rpm","python3-tkinter-3.11.6-28.oe2403sp3.aarch64.rpm","python3-unversioned-command-3.11.6-28.oe2403sp3.aarch64.rpm"],"noarch":["python3-help-3.11.6-28.oe2403sp3.noarch.rpm"],"src":["python3-3.11.6-28.oe2403sp3.src.rpm"],"x86_64":["python3-3.11.6-28.oe2403sp3.x86_64.rpm","python3-debug-3.11.6-28.oe2403sp3.x86_64.rpm","python3-debuginfo-3.11.6-28.oe2403sp3.x86_64.rpm","python3-debugsource-3.11.6-28.oe2403sp3.x86_64.rpm","python3-devel-3.11.6-28.oe2403sp3.x86_64.rpm","python3-tkinter-3.11.6-28.oe2403sp3.x86_64.rpm","python3-unversioned-command-3.11.6-28.oe2403sp3.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2116"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-1502"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4786"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-6100"}],"database_specific":{"severity":"Critical"}}