CVE Explorer
CVE-2026-56740
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 limit the number of environment variables a client may inject via the Telnet NEW-ENVIRON option, and TelnetIO.readNEVariables() in TelnetIO.java:1127-1180 stores each variable pair in a HashMap held by ConnectionData, allowing an unauthenticated attacker to flood unique variable pairs before the terminating IAC SE byte and exhaust JVM heap memory with an
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_v5affectedurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /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_v5cvssurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /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_v5cweurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/problemTypes/0/descriptions/0
Source references
10 source assertions{"name":"https://github.com/jline/jline3/commit/0389f0ee6d0375901b602671ad5dafd4d1d4ee09","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/commit/0389f0ee6d0375901b602671ad5dafd4d1d4ee09"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/references/3
{"name":"https://github.com/jline/jline3/commit/4ee3a73849ffb9a85ec748e4e8cd8f6d81f84f40","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/commit/4ee3a73849ffb9a85ec748e4e8cd8f6d81f84f40"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/references/4
{"name":"https://github.com/jline/jline3/commit/934f09e6128cee33c2b13d42b6e859c1ee2d194b","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/commit/934f09e6128cee33c2b13d42b6e859c1ee2d194b"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/references/5
{"name":"https://github.com/jline/jline3/pull/2000","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/pull/2000"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/references/1
{"name":"https://github.com/jline/jline3/pull/2001","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/pull/2001"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/references/2
{"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_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/references/6
{"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_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/references/7
{"name":"https://github.com/jline/jline3/releases/tag/jline-3.30.14","tags":["x_refsource_MISC"],"url":"https://github.com/jline/jline3/releases/tag/jline-3.30.14"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/references/8
{"name":"https://github.com/jline/jline3/security/advisories/GHSA-47qp-hqvx-6r3f","tags":["x_refsource_CONFIRM"],"url":"https://github.com/jline/jline3/security/advisories/GHSA-47qp-hqvx-6r3f"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/jline/jline3/security/advisories/GHSA-47qp-hqvx-6r3f"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:65f085c7f9e6b9759aae153dc98a9f029050c2bcdf323b1e9d14b9edf25b0d50 · sha256:761c40de49652e94… · /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.