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CVE-2026-3731

A weakness has been identified in libssh up to 0.11.3. The impacted element is the function sftp_extensions_get_name/sftp_extensions_get_data of the file src/sftp.c of the component SFTP Extension Name Handler. Executing a manipulation of the argument idx can lead to out-of-bounds read. The attack may be performed from remote. Upgrading to version 0.11.4 and 0.12.0 is sufficient to resolve this issue. This patch is called 855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60. You should upgrade the affected
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:86ef072fd4a99b02dc1df28148517131107639aade37cfafb631bce928e0763a
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":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/metrics/2/cvssV3_0

{"metric":{"baseScore":5,"vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/metrics/1/cvssV3_1
cwe · 2 assertions

{"cweId":"CWE-125","description":"Out-of-Bounds Read","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-119","description":"Memory Corruption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*"],"modules":["SFTP Extension Name Handler"],"product":"libssh","vendor":"n/a","versions":[{"status":"affected","version":"0.11.0"},{"status":"affected","version":"0.11.1"},{"status":"affected","version":"0.11.2"},{"status":"affected","version":"0.11.3"},{"status":"unaffected","version":"0.11.4"},{"status":"unaffected","version":"0.12.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/metrics/2/cvssV3_0
{"metric":{"baseScore":5,"vectorString":"AV:N/AC:L/Au:N/C:N/I:N/A:P/E:ND/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":5.3,"baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:X/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/metrics/1/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-125","description":"Out-of-Bounds Read","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-119","description":"Memory Corruption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/problemTypes/1/descriptions/0

Source references

6 source assertions
{"tags":["patch"],"url":"https://gitlab.com/libssh/libssh-mirror/-/commit/855a0853ad3abd4a6cd85ce06fce6d8d4c7a0b60"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/references/4
{"name":"VDB-349709 | CTI Indicators (IOB, IOC, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/?ctiid.349709"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/references/1
{"name":"VDB-349709 | libssh SFTP Extension Name sftp.c sftp_extensions_get_data out-of-bounds","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/?id.349709"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/references/0
{"name":"Submit #767120 | libssh.org libssh libssh < 0.11.4; < 0.12.0 Out-of-Bounds Read","tags":["third-party-advisory"],"url":"https://vuldb.com/?submit.767120"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/references/2
{"tags":["patch"],"url":"https://www.libssh.org/files/0.12/libssh-0.12.0.tar.xz"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/references/5
{"tags":["related"],"url":"https://www.libssh.org/security/advisories/libssh-2026-sftp-extensions.txt"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1a88c5603506db299c577202d5cdbfa359d8eec36a71f45a30370f066085c3bb · sha256:235a58a028f785a7… · /containers/cna/references/3

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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