Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-9323

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 recon
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:ba2f0254ea3b7668e9541025b2de185ca015df753c2f5f9db4b89352ca9f404a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpa…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/metrics/0/cvssV4_0

Affected products and versions

1 source assertion
{"defaultStatus":"affected","product":"urwid","vendor":"urwid","versions":[{"lessThanOrEqual":"24acd12","status":"affected","version":"0","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"HIGH","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":9.2,"baseSeverity":"CRITICAL","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpa…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-338","description":"Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"name":"Product","tags":["product"],"url":"https://github.com/urwid/urwid"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/references/1
{"name":"Patch Commit","tags":["patch"],"url":"https://github.com/urwid/urwid/commit/24acd12f0d0598036d0d577f2ee63e4a27b4a3d9"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/references/2
{"name":"GitHub Issue","tags":["issue-tracking"],"url":"https://github.com/urwid/urwid/issues/1127"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/references/3
{"name":"Pull Request","tags":["issue-tracking"],"url":"https://github.com/urwid/urwid/pull/1128"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/references/4
{"name":"GitHub Security Advisory (GHSA-rjwp-g85x-gmjv)","tags":["vendor-advisory"],"url":"https://github.com/urwid/urwid/security/advisories/GHSA-rjwp-g85x-gmjv"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/insecure-prng-and-information-exposure-in-urwid-web-display-backend"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:2924dcef3c2c2ffea8f0b7d78671abc73428b12eef462f7e686065d46fb6ff0e · sha256:8680923744a39a10… · /containers/cna/references/5

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

← Back to CVE Explorer