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CVE-2026-56741

JLine is a Java library for handling console input. Prior to 3.30.14, 4.0.16, and 4.2.1, the JLine3 Telnet server remote-telnet module does not apply an upper bound to terminal dimensions received via the Telnet NAWS option, and TelnetIO.handleNAWS() in TelnetIO.java:856-879 reads client-supplied width and height as 16-bit unsigned integers and passes values such as 65535x65535 to setTerminalGeometry(), allowing an unauthenticated remote attacker to repeatedly alternate values and trigger contin
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0d1f73592062fee8ee5d2811fc72f2c2006fef7a147956f53160348f8aa40138
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"jline3","vendor":"jline","versions":[{"status":"affected","version":"< 3.30.14"},{"status":"affected","version":">= 4.0.0, < 4.0.16"},{"status":"affected","version":">= 4.1.0, < 4.2.1"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-400","description":"CWE-400: Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"name":"https://github.com/jline/jline3/commit/3ea9cad8699714dc072fade29d36be0d1e23d708","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/commit/3ea9cad8699714dc072fade29d36be0d1e23d708"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/references/2
{"name":"https://github.com/jline/jline3/commit/733eb353dca7b0ea0252e724445b6defa29c393e","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/commit/733eb353dca7b0ea0252e724445b6defa29c393e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/references/3
{"name":"https://github.com/jline/jline3/commit/86b7ba7801988aadb1a67555629522a71d603bd3","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/commit/86b7ba7801988aadb1a67555629522a71d603bd3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/references/4
{"name":"https://github.com/jline/jline3/pull/2000","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/pull/2000"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/references/1
{"name":"https://github.com/jline/jline3/releases/tag/4.0.16","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/releases/tag/4.0.16"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/references/5
{"name":"https://github.com/jline/jline3/releases/tag/4.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/releases/tag/4.2.1"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/references/6
{"name":"https://github.com/jline/jline3/security/advisories/GHSA-2r2c-cx56-8933","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jline/jline3/security/advisories/GHSA-2r2c-cx56-8933"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/jline/jline3/security/advisories/GHSA-2r2c-cx56-8933"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:efedcdf95cdae168d6c578b41993f35ace50634507e4f1a02b307744a925cb8e · sha256:c4eb3099390d4233… · /containers/adp/0/references/0

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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