OESA-2025-2306 (CVE-2025-1795)
Vulnerability from osv_openeuler – Published: 2025-09-19 11:09 – Updated: 2026-08-06 11:09 – Source websitePython 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.
Security Fix(es):
During an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.(CVE-2025-1795)
There is an issue in CPython when using bytes.decode("unicode_escape", error="ignore|replace"). If you are not using the "unicode_escape" encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.(CVE-2025-4516)
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"aarch64": [
"python3-3.11.6-16.oe2403sp1.aarch64.rpm",
"python3-debug-3.11.6-16.oe2403sp1.aarch64.rpm",
"python3-debuginfo-3.11.6-16.oe2403sp1.aarch64.rpm",
"python3-debugsource-3.11.6-16.oe2403sp1.aarch64.rpm",
"python3-devel-3.11.6-16.oe2403sp1.aarch64.rpm",
"python3-tkinter-3.11.6-16.oe2403sp1.aarch64.rpm",
"python3-unversioned-command-3.11.6-16.oe2403sp1.aarch64.rpm"
],
"noarch": [
"python3-help-3.11.6-16.oe2403sp1.noarch.rpm"
],
"src": [
"python3-3.11.6-16.oe2403sp1.src.rpm"
],
"x86_64": [
"python3-3.11.6-16.oe2403sp1.x86_64.rpm",
"python3-debug-3.11.6-16.oe2403sp1.x86_64.rpm",
"python3-debuginfo-3.11.6-16.oe2403sp1.x86_64.rpm",
"python3-debugsource-3.11.6-16.oe2403sp1.x86_64.rpm",
"python3-devel-3.11.6-16.oe2403sp1.x86_64.rpm",
"python3-tkinter-3.11.6-16.oe2403sp1.x86_64.rpm",
"python3-unversioned-command-3.11.6-16.oe2403sp1.x86_64.rpm"
]
},
"package": {
"ecosystem": "openEuler:24.03-LTS-SP1",
"name": "python3",
"purl": "pkg:rpm/openEuler/python3\u0026distro=openEuler-24.03-LTS-SP1"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.11.6-16.oe2403sp1"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"database_specific": {
"severity": "Medium"
},
"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\nDuring an address list folding when a separating comma ends up on a folded line and that line is to be unicode-encoded then the separator itself is also unicode-encoded. Expected behavior is that the separating comma remains a plan comma. This can result in the address header being misinterpreted by some mail servers.(CVE-2025-1795)\n\nThere is an issue in CPython when using `bytes.decode(\u0026quot;unicode_escape\u0026quot;, error=\u0026quot;ignore|replace\u0026quot;)`. If you are not using the \u0026quot;unicode_escape\u0026quot; encoding or an error handler your usage is not affected. To work-around this issue you may stop using the error= handler and instead wrap the bytes.decode() call in a try-except catching the DecodeError.(CVE-2025-4516)",
"id": "OESA-2025-2306",
"modified": "2026-08-06T11:09:22Z",
"published": "2025-09-19T11:09:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-2306"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-1795"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-4516"
}
],
"schema_version": "1.7.2",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
],
"summary": "python3 security update",
"upstream": [
"CVE-2025-1795",
"CVE-2025-4516"
]
}
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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- Confirmed: The vulnerability has been validated from an analyst's perspective.
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- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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