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Posted to common-issues@hadoop.apache.org by "ksikocinski-relativity (via GitHub)" <gi...@apache.org> on 2026/09/09 13:21:23 UTC
[PR] Upgrade JLine to 3.30.14 to fix CVE-2026-56740 and CVE-2026-56741 [hadoop]
ksikocinski-relativity opened a new pull request, #8734:
URL: https://github.com/apache/hadoop/pull/8734
`Note: I don't have an ASF Jira account yet - a request is pending via the self-serve portal, so this PR isn't linked to a HADOOP issue. Happy to file one and rename the PR as soon as the account is approved; equally happy for a committer to file and link it if that's easier.`
Hadoop pins the org.jline:jline uber jar at 3.9.0. That jar bundles the jline-remote-telnet classes, which are affected by two high-severity denial-of-service issues:
* [CVE-2026-56740](https://github.com/advisories/GHSA-47qp-hqvx-6r3f) - the Telnet server does not limit the number of environment variables a client may inject via the NEW-ENVIRON option, so an unauthenticated client can exhaust the JVM heap.
* [CVE-2026-56741](https://github.com/advisories/GHSA-2r2c-cx56-8933) - the Telnet server does not bound terminal dimensions received via the NAWS option, so an unauthenticated client can force continuous expensive rendering work and exhaust CPU.
Both are fixed in JLine 3.30.14, 4.0.16 and 4.2.1. This moves the pinned version to 3.30.14, staying on the 3.x line to avoid the API changes that come with the 4.x major.
No Hadoop code starts a JLine Telnet server, so the vulnerable classes were never reachable at runtime; the upgrade removes them from the distribution so the artifacts no longer carry the affected code.
The only consumer of JLine is ContainerShellWebSocket in hadoop-yarn-client, which uses TerminalBuilder, LineReaderBuilder and LineReaderImpl.readCharacter(). All of those keep the same signatures in 3.30.14.
LICENSE-binary is updated to match. JLine remains BSD 3-Clause.
Contains content generated by Claude.
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Re: [PR] Upgrade JLine to 3.30.14 to fix CVE-2026-56740 and CVE-2026-56741 [hadoop]
Posted by "hadoop-yetus (via GitHub)" <gi...@apache.org>.
hadoop-yetus commented on PR #8734:
URL: https://github.com/apache/hadoop/pull/8734#issuecomment-5612095705
:broken_heart: **-1 overall**
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Re: [PR] HADOOP-20035. Upgrade JLine to 3.30.14 to fix CVE-2026-56740 and CVE-2026-56741 [hadoop]
Posted by "steveloughran (via GitHub)" <gi...@apache.org>.
steveloughran commented on PR #8734:
URL: https://github.com/apache/hadoop/pull/8734#issuecomment-6384891770
sorry, @ksikocinski-relativity, only just been through that approval backlog & nobody else looked at it.
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Re: [PR] Upgrade JLine to 3.30.14 to fix CVE-2026-56740 and CVE-2026-56741 [hadoop]
Posted by "hadoop-yetus (via GitHub)" <gi...@apache.org>.
hadoop-yetus commented on PR #8734:
URL: https://github.com/apache/hadoop/pull/8734#issuecomment-5627650905
:broken_heart: **-1 overall**
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Re: [PR] Upgrade JLine to 3.30.14 to fix CVE-2026-56740 and CVE-2026-56741 [hadoop]
Posted by "hadoop-yetus (via GitHub)" <gi...@apache.org>.
hadoop-yetus commented on PR #8734:
URL: https://github.com/apache/hadoop/pull/8734#issuecomment-5612073474
:broken_heart: **-1 overall**
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|||| _ Patch Compile Tests _ |
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| Reason | Tests |
|-------:|:------|
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|----------:|:-------------|
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| versions | git=2.43.0 maven=3.9.15 shellcheck=0.9.0 |
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Re: [PR] HADOOP-20035. Upgrade JLine to 3.30.14 to fix CVE-2026-56740 and CVE-2026-56741 [hadoop]
Posted by "steveloughran (via GitHub)" <gi...@apache.org>.
steveloughran merged PR #8734:
URL: https://github.com/apache/hadoop/pull/8734
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