{"id":"CVE-2026-9323","aliases":["ALSA-2026:58561","ALSA-2026:58562","ALSA-2026:58952","AZL-92916","BELL-CVE-2026-9323","DEBIAN-CVE-2026-9323","EUVD-2026-45381","GHSA-83x9-8wvq-rrcp","GHSA-rjwp-g85x-gmjv","MGASA-2026-0466","OESA-2026-3193","RHSA-2026:57637","RHSA-2026:57638","RHSA-2026:58561","RHSA-2026:58562","RHSA-2026:58952","RHSA-2026:58953","RHSA-2026:58954","RHSA-2026:58955","RHSA-2026:59198","RHSA-2026:60353","RLSA-2026:58561","RLSA-2026:58562","RLSA-2026:58952","SUSE-SU-2026:3425-1","SUSE-SU-2026:3460-1","UBUNTU-CVE-2026-9323","USN-8751-1","openSUSE-SU-2026:11356-1"],"status":"published","title":"Insecure PRNG and Information Exposure in urwid Web Display Backend","description":"The urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","severity":{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00715,"percentile":0.54001,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-338"],"published":"2026-07-18T13:51:06Z","modified":"2026-11-09T02:47:16Z","fixes":[{"ecosystem":"AlmaLinux:10","package":"python3-urwid","fixed_in":["2.5.3-4.el10_2.5"],"sources":["osv"]},{"ecosystem":"AlmaLinux:8","package":"python3-urwid","fixed_in":["1.3.1-5.el8_10"],"sources":["osv"]},{"ecosystem":"AlmaLinux:9","package":"python3-urwid","fixed_in":["2.1.2-4.el9_8.1"],"sources":["osv"]},{"ecosystem":"Alpaquita:23","package":"py3-urwid","fixed_in":["2.2.3-r1"],"sources":["osv"]},{"ecosystem":"Alpaquita:25","package":"py3-urwid","fixed_in":["2.6.13-r1"],"sources":["osv"]},{"ecosystem":"Alpaquita:stream","package":"py3-urwid","fixed_in":["3.0.5-r1"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"urwid","fixed_in":["2.1.2-4+deb12u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"urwid","fixed_in":["4.1.3-1"],"sources":["osv"]},{"ecosystem":"Mageia:10","package":"python-urwid","fixed_in":["4.1.3-1.mga10"],"sources":["osv"]},{"ecosystem":"Mageia:10","package":"python-wcwidth","fixed_in":["0.8.3-1.mga10"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP4","package":"python-urwid","fixed_in":["2.1.2-4.oe2203sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"python-urwid","fixed_in":["2.1.2-6.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP3","package":"python-urwid","fixed_in":["2.1.2-6.oe2403sp3"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP4","package":"python-urwid","fixed_in":["2.1.2-6.oe2403sp4"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP4","package":"python-urwid","fixed_in":["2.1.2-3.oe2003sp4"],"sources":["osv"]},{"ecosystem":"Red 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ulletins/detail/?id=openEuler-SA-2026-3193","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:57637","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#important","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502072","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_57637.json","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-9323","tags":["advisory","report"]},{"url":"https://access.redhat.com/errata/RHSA-2026:57638","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_57638.json","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_58561.json","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_58562.json","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_58952.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:58953","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_58953.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:58954","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_58954.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:58955","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_58955.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:59198","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_59198.json","tags":["advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:60353","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_60353.json","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2026:58561","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2026:58562","tags":["advisory"]},{"url":"https://errata.rockylinux.org/RLSA-2026:58952","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20263425-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1271868","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-9323","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20263460-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-9323","tags":["report"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-9323","title":"Insecure PRNG and Information Exposure in urwid Web Display Backend","description":"The urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","status":"published","published":"2026-07-18T13:51:06.021Z","modified":"2026-11-08T14:09:21.093Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical","assessor":"cna"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-338"],"updated_at":"2026-11-08T15:43:34.234229Z"}],"euvd":[{"id":"EUVD-2026-45381","description":"The urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","status":"published","published":"2026-07-18T13:51:06Z","modified":"2026-11-08T14:09:21Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-08T15:13:06.469155Z"}],"ghsa":[{"id":"GHSA-83x9-8wvq-rrcp","title":"Duplicate Advisory: urwid: Insecure PRNG and Information Exposure in Web Display Backend","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-rjwp-g85x-gmjv. This link is maintained to preserve external references.\n\n### Original Description\nThe urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","status":"withdrawn","published":"2026-07-18T15:31:50Z","modified":"2026-11-05T15:17:28Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-338"],"updated_at":"2026-11-05T16:36:48.630764Z"}],"nvd":[{"id":"CVE-2026-9323","description":"The urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","status":"published","published":"2026-07-18T14:17:12.17Z","modified":"2026-09-15T08:17:07.543Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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","level":"critical","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-338"],"updated_at":"2026-11-02T14:12:30.631352Z"}],"osv":[{"id":"BELL-CVE-2026-9323","status":"published","published":"2026-07-22T06:04:07.759872Z","modified":"2026-08-05T07:15:05.351238887Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:27.164451Z"},{"id":"CVE-2026-9323","title":"Insecure PRNG and Information Exposure in urwid Web Display Backend","description":"The urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","status":"published","published":"2026-07-18T13:51:06.021Z","modified":"2026-11-09T02:47:16.263091093Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-338"],"updated_at":"2026-11-09T03:16:17.543303Z"},{"id":"DEBIAN-CVE-2026-9323","description":"The urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","status":"published","published":"2026-07-18T14:17:12.17Z","modified":"2026-10-01T03:03:46.252897222Z","cvss":[{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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","level":"critical"}],"updated_at":"2026-11-02T15:46:06.846102Z"},{"id":"GHSA-83x9-8wvq-rrcp","title":"Duplicate Advisory: urwid: Insecure PRNG and Information Exposure in Web Display Backend","description":"### Duplicate Advisory\nThis advisory has been withdrawn because it is a duplicate of GHSA-rjwp-g85x-gmjv. This link is maintained to preserve external references.\n\n### Original Description\nThe urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","status":"withdrawn","published":"2026-07-18T15:31:50Z","modified":"2026-11-05T15:30:04.182187938Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"cwes":["CWE-338"],"updated_at":"2026-11-05T16:37:03.762555Z"},{"id":"OESA-2026-3193","title":"python-urwid security update","description":"Urwid is a console user interface library for Python. It includes many features useful for text console application developers\r\n\r\nSecurity Fix(es):\n\nThe urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python\u0026apos;s Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim\u0026apos;s terminal screen via the polling endpoint, inject keystrokes into the victim\u0026apos;s session (yielding OS-level code execution with the session owner\u0026apos;s privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed(CVE-2026-9323)","status":"published","published":"2026-08-01T11:12:04Z","modified":"2026-08-18T01:21:25.824691504Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:52:46.823443Z"},{"id":"RHSA-2026:57637","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-21T10:14:06Z","modified":"2026-08-27T10:15:23Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.457353Z"},{"id":"RHSA-2026:57638","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-21T10:14:06Z","modified":"2026-08-27T10:15:24Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.457353Z"},{"id":"RHSA-2026:58561","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-24T10:18:40Z","modified":"2026-08-27T10:15:27Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.457353Z"},{"id":"RHSA-2026:58562","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-24T10:18:41Z","modified":"2026-08-27T10:15:27Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.457353Z"},{"id":"RHSA-2026:58952","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-25T10:23:02Z","modified":"2026-08-27T10:15:36Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.457353Z"},{"id":"RHSA-2026:58953","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-25T10:23:03Z","modified":"2026-08-27T10:15:36Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.457353Z"},{"id":"RHSA-2026:58954","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-25T10:23:03Z","modified":"2026-08-27T10:15:37Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.457353Z"},{"id":"RHSA-2026:58955","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-25T10:23:04Z","modified":"2026-08-27T10:15:37Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.457353Z"},{"id":"RHSA-2026:59198","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-25T10:23:18Z","modified":"2026-08-27T10:15:45Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RHSA-2026:60353","title":"Red Hat Security Advisory: python-urwid security update","status":"published","published":"2026-08-27T10:16:12Z","modified":"2026-08-27T10:32:25.462647053Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:21.91255Z"},{"id":"RLSA-2026:58561","title":"Important: python-urwid security update","description":"Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.\n\nSecurity Fix(es):\n\n* urwid: Urwid: Predictable session IDs lead to remote code execution and information disclosure (CVE-2026-9323)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-08-24T12:08:45.914036Z","modified":"2026-08-24T12:30:09.371970837Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:26.111232Z"},{"id":"RLSA-2026:58562","title":"Important: python-urwid security update","description":"Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.\n\nSecurity Fix(es):\n\n* urwid: Urwid: Predictable session IDs lead to remote code execution and information disclosure (CVE-2026-9323)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-08-24T12:00:58.977848Z","modified":"2026-08-24T12:30:09.369576055Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:26.111232Z"},{"id":"RLSA-2026:58952","title":"Important: python-urwid security update","description":"Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.\n\nSecurity Fix(es):\n\n* urwid: Urwid: Predictable session IDs lead to remote code execution and information disclosure (CVE-2026-9323)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","status":"published","published":"2026-08-25T12:04:45.886829Z","modified":"2026-08-26T01:11:15.276002951Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:26.111232Z"},{"id":"UBUNTU-CVE-2026-9323","description":"The urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","status":"published","published":"2026-07-18T14:17:00Z","modified":"2026-10-17T13:01:17.737560069Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"4.0","score":9.2,"vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"critical"}],"updated_at":"2026-11-02T16:57:44.071534Z"},{"id":"ALSA-2026:58561","title":"Important: python-urwid security update","description":"Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.  \n\nSecurity Fix(es):  \n\n  * urwid: Urwid: Predictable session IDs lead to remote code execution and information disclosure (CVE-2026-9323)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-08-24T00:00:00Z","modified":"2026-10-29T11:30:47.792318736Z","updated_at":"2026-11-02T15:27:54.753319Z"},{"id":"ALSA-2026:58562","title":"Important: python-urwid security update","description":"Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.  \n\nSecurity Fix(es):  \n\n  * urwid: Urwid: Predictable session IDs lead to remote code execution and information disclosure (CVE-2026-9323)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-08-24T00:00:00Z","modified":"2026-10-29T11:02:24.972849257Z","updated_at":"2026-11-02T15:27:54.753319Z"},{"id":"ALSA-2026:58952","title":"Important: python-urwid security update","description":"Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems.  \n\nSecurity Fix(es):  \n\n  * urwid: Urwid: Predictable session IDs lead to remote code execution and information disclosure (CVE-2026-9323)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n","status":"published","published":"2026-08-24T00:00:00Z","modified":"2026-10-29T11:32:37.000952289Z","updated_at":"2026-11-02T15:27:54.753319Z"},{"id":"AZL-92916","title":"CVE-2026-9323 affecting package python-urwid 2.6.14-1","description":"The urwid web display backend (urwid/display/web.py) generates web session identifiers (urwid_id) in Screen.start() by concatenating two random.randrange(10**9) calls that use Python's Mersenne Twister PRNG, which is not cryptographically secure. Each call consumes approximately 30 bits of PRNG state, and the Mersenne Twister internal state is approximately 19,937 bits, so an attacker who observes approximately 334 session IDs (for example via the X-Urwid-ID HTTP response header) can fully reconstruct the internal state and predict all past and future session IDs (Path B). The same identifier is also used as the filename of a FIFO created in the world-listable /tmp directory (for example /tmp/urwid375487765176907690.in), so any local user on the host can list /tmp to enumerate active session tokens directly (Path A). With a valid session ID, an attacker can read the victim's terminal screen via the polling endpoint, inject keystrokes into the victim's session (yielding OS-level code execution with the session owner's privileges if the session runs a shell), and inject exit sequences or flood the FIFO to terminate or crash the session. A prior Bandit S311 warning on this usage was suppressed with # noqa: S311 rather than fixed","status":"published","published":"2026-07-18T14:17:12Z","modified":"2026-11-05T05:36:30Z","updated_at":"2026-11-05T16:41:25.880689Z"},{"id":"MGASA-2026-0466","title":"Updated python-urwid \u0026 python-wcwidth packages fixes a security vulnerability","description":"Insecure PRNG and Information Exposure in urwid Web Display Backend\n","status":"published","published":"2026-10-02T06:40:06Z","modified":"2026-10-02T06:45:03.311350887Z","updated_at":"2026-11-02T15:49:43.795591Z"},{"id":"openSUSE-SU-2026:11356-1","title":"python313-urwid-4.0.5-1.1 on GA media","description":"These are all security issues fixed in the python313-urwid-4.0.5-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-07-23T00:00:00Z","modified":"2026-07-24T17:16:09.6256344Z","updated_at":"2026-11-02T16:58:39.516824Z"},{"id":"SUSE-SU-2026:3425-1","title":"Security update for python-urwid","description":"This update for python-urwid fixes the following issue\n\nCVE-2026-9323: web session IDs generated by `Screen.start()` are not cryptographically secure (bsc#1271868).\n","status":"published","published":"2026-07-30T11:11:34Z","modified":"2026-07-31T09:15:07.884973999Z","updated_at":"2026-11-02T15:54:04.987808Z"},{"id":"SUSE-SU-2026:3460-1","title":"Security update for python-urwid","description":"This update for python-urwid fixes the following issue:\n\n- CVE-2026-9323: web session IDs generated by `Screen.start()` are not cryptographically secure (bsc#1271868).\n","status":"published","published":"2026-08-03T12:11:29Z","modified":"2026-08-04T11:45:08.559675765Z","updated_at":"2026-11-02T15:54:04.987808Z"},{"id":"USN-8751-1","title":"urwid vulnerabilities","description":"Katriel Moses discovered that Urwid used a weak PRNG. A local attacker\ncould possibly use this issue to cause a denial of service or execute\narbitrary code.","status":"published","published":"2026-09-14T03:34:34Z","modified":"2026-09-14T11:27:33.300781941Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}