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CVE-2026-9521

A security vulnerability has been detected in fraillt bitsery up to 5.2.4. Affected is the function loadFromSharedState in the library include/bitsery/ext/std_smart_ptr.h. Such manipulation leads to improper validation of specified type of input. It is possible to launch the attack remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 5.2.5 is able to address this issue. The name of the patch is 66d16516e24893bebc1c8af52bf2fe9ad0735061. Upgrading the affected co
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:68e67b00add2d9f09189d76b76c900eeb44798744723ab44a2b641ad4e4e3dbe
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/metrics/3/cvssV2_0
cwe · 2 assertions

{"cweId":"CWE-20","description":"Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-1287","description":"Improper Validation of Specified Type of Input","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:fraillt:bitsery:*:*:*:*:*:*:*:*"],"product":"bitsery","vendor":"fraillt","versions":[{"status":"affected","version":"5.2.0"},{"status":"affected","version":"5.2.1"},{"status":"affected","version":"5.2.2"},{"status":"affected","version":"5.2.3"},{"status":"affected","version":"5.2.4"},{"status":"unaffected","version":"5.2.5"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":7.3,"baseSeverity":"HIGH","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":7.5,"vectorString":"AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/metrics/3/cvssV2_0

CWE assertions

2 source assertions
{"cweId":"CWE-20","description":"Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-1287","description":"Improper Validation of Specified Type of Input","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"tags":["exploit"],"url":"https://gist.github.com/TrebledJ/750abc64a826f19dd2d6774724629b71"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/references/3
{"tags":["product"],"url":"https://github.com/fraillt/bitsery/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/references/7
{"tags":["release-notes"],"url":"https://github.com/fraillt/bitsery/blob/master/CHANGELOG.md#525-2025-10-09"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/fraillt/bitsery/commit/66d16516e24893bebc1c8af52bf2fe9ad0735061"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/fraillt/bitsery/releases/tag/v5.2.5"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/references/6
{"name":"Submit #814457 | fraillt bitsery 5.2.4 CWE-1287, CWE-843 (Type Confusion)","tags":["third-party-advisory"],"url":"https://vuldb.com/submit/814457"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/references/2
{"name":"VDB-365541 | fraillt bitsery std_smart_ptr.h loadFromSharedState improper validation of specified type of input","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/vuln/365541"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/references/0
{"name":"VDB-365541 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/365541/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:34f66e39ecc593941a7890d66193884ca7e74e5b0d78569755ad7006ba691cc3 · sha256:657df1a56a13413a… · /containers/cna/references/1

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.

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