Apache HttpClient versions prior to version 4.5.13 and 5.0.3 can misinterpret malformed authority component in request URIs passed to the library as java.net.URI object and pick the wrong target host for request execution.
References
Link Providers
https://lists.apache.org/thread.html/r03bbc318c81be21f5c8a9b85e34f2ecc741aa804a8e43b0ef2c37749%40%3Cissues.maven.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r043a75acdeb52b15dd5e9524cdadef4202e6a5228644206acf9363f9%40%3Cdev.hive.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r06cf3ca5c8ceb94b39cd24a73d4e96153b485a7dac88444dd876accb%40%3Cissues.drill.apache.org%3E cve-icon cve-icon
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https://lists.apache.org/thread.html/r12cb62751b35bdcda0ae2a08b67877d665a1f4d41eee0fa7367169e0%40%3Cdev.ranger.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r132e4c6a560cfc519caa1aaee63bdd4036327610eadbd89f76dd5457%40%3Cdev.creadur.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r2835543ef0f91adcc47da72389b816e36936f584c7be584d2314fac3%40%3Cissues.lucene.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r2a03dc210231d7e852ef73015f71792ac0fcaca6cccc024c522ef17d%40%3Ccommits.creadur.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r2dc7930b43eadc78220d269b79e13ecd387e4bee52db67b2f47d4303%40%3Cgitbox.hive.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r34178ab6ef106bc940665fd3f4ba5026fac3603b3fa2aefafa0b619d%40%3Cdev.ranger.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r34efec51cb817397ccf9f86e25a75676d435ba5f83ee7b2eabdad707%40%3Ccommits.creadur.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3cecd59fba74404cbf4eb430135e1080897fb376f111406a78bed13a%40%3Cissues.lucene.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r3f740e4c38bba1face49078aa5cbeeb558c27be601cc9712ad2dcd1e%40%3Ccommits.creadur.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r4850b3fbaea02fde2886e461005e4af8d37c80a48b3ce2a6edca0e30%40%3Cissues.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r549ac8c159bf0c568c19670bedeb8d7c0074beded951d34b1c1d0d05%40%3Cdev.drill.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r55b2a1d1e9b1ec9db792b93da8f0f99a4fd5a5310b02673359d9b4d1%40%3Cdev.drill.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r5b55f65c123a7481104d663a915ec45a0d103e6aaa03f42ed1c07a89%40%3Cdev.jackrabbit.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r5de3d3808e7b5028df966e45115e006456c4e8931dc1e29036f17927%40%3Cissues.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r5fec9c1d67f928179adf484b01e7becd7c0a6fdfe3a08f92ea743b90%40%3Cissues.hive.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r63296c45d5d84447babaf39bd1487329d8a80d8d563e67a4b6f3d8a7%40%3Cdev.ranger.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r69a94e2f302d1b778bdfefe90fcb4b8c50b226438c3c8c1d0de85a19%40%3Cdev.ranger.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r6a3cda38d050ebe13c1bc9a28d0a8ec38945095d07eca49046bcb89f%40%3Cissues.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r6d672b46622842e565e00f6ef6bef83eb55d8792aac2bee75bff9a2a%40%3Cissues.lucene.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r6dab7da30f8bf075f79ee189e33b45a197502e2676481bb8787fc0d7%40%3Cdev.hc.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r6eb2dae157dbc9af1f30d1f64e9c60d4ebef618f3dce4a0e32d6ea4d%40%3Ccommits.drill.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r70c429923100c5a4fae8e5bc71c8a2d39af3de4888f50a0ac3755e6f%40%3Ccommits.creadur.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r87ddc09295c27f25471269ad0a79433a91224045988b88f0413a97ec%40%3Cissues.bookkeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r8aa1e5c343b89aec5b69961471950e862f15246cb6392910161c389b%40%3Cissues.maven.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/r9e52a6c72c8365000ecd035e48cc9fee5a677a150350d4420c46443d%40%3Cdev.drill.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/ra539f20ef0fb0c27ee39945b5f56bf162e5c13d1c60f7344dab8de3b%40%3Cissues.maven.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/ra8bc6b61c5df301a6fe5a716315528ecd17ccb8a7f907e24a47a1a5e%40%3Cissues.lucene.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rad6222134183046f3928f733bf680919e0c390739bfbfe6c90049673%40%3Cissues.drill.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rae14ae25ff4a60251e3ba2629c082c5ba3851dfd4d21218b99b56652%40%3Cissues.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rb33212dab7beccaf1ffef9b88610047c644f644c7a0ebdc44d77e381%40%3Ccommits.turbine.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rb4ba262d6f08ab9cf8b1ebbcd9b00b0368ffe90dad7ad7918b4b56fc%40%3Cdev.drill.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rb725052404fabffbe093c83b2c46f3f87e12c3193a82379afbc529f8%40%3Csolr-user.lucene.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rc0863892ccfd9fd0d0ae10091f24ee769fb39b8957fe4ebabfc11f17%40%3Cdev.jackrabbit.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rc3739e0ad4bcf1888c6925233bfc37dd71156bbc8416604833095c42%40%3Cdev.drill.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rc505fee574fe8d18f9b0c655a4d120b0ae21bb6a73b96003e1d9be35%40%3Cissues.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rc5c6ccb86d2afe46bbd4b71573f0448dc1f87bbcd5a0d8c7f8f904b2%40%3Cissues.lucene.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rc990e2462ec32b09523deafb2c73606208599e196fa2d7f50bdbc587%40%3Cissues.maven.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rcced7ed3237c29cd19c1e9bf465d0038b8b2e967b99fc283db7ca553%40%3Cdev.ranger.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rcd9ad5dda60c82ab0d0c9bd3e9cb1dc740804451fc20c7f451ef5cc4%40%3Cgitbox.hive.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rd0e44e8ef71eeaaa3cf3d1b8b41eb25894372e2995ec908ce7624d26%40%3Ccommits.pulsar.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rd5ab56beb2ac6879f6ab427bc4e5f7691aed8362d17b713f61779858%40%3Cissues.hive.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/re504acd4d63b8df2a7353658f45c9a3137e5f80e41cf7de50058b2c1%40%3Cissues.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rea3dbf633dde5008d38bf6600a3738b9216e733e03f9ff7becf79625%40%3Cissues.drill.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/ree942561f4620313c75982a4e5f3b74fe6f7062b073210779648eec2%40%3Cissues.lucene.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/reef569c2419705754a3acf42b5f19b2a158153cef0e448158bc54917%40%3Cdev.drill.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rf03228972e56cb4a03e6d9558188c2938078cf3ceb23a3fead87c9ca%40%3Cissues.bookkeeper.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rf43d17ed0d1fb4fb79036b582810ef60b18b1ef3add0d5dea825af1e%40%3Cissues.lucene.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rf4db88c22e1be9eb60c7dc623d0528642c045fb196a24774ac2fa3a3%40%3Cissues.lucene.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rf7ca60f78f05b772cc07d27e31bcd112f9910a05caf9095e38ee150f%40%3Cdev.ranger.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rfb35f6db9ba1f1e061b63769a4eff5abadcc254ebfefc280e5a0dcf1%40%3Ccommits.creadur.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rfbedcb586a1e7dfce87ee03c720e583fc2ceeafa05f35c542cecc624%40%3Cissues.solr.apache.org%3E cve-icon cve-icon
https://lists.apache.org/thread.html/rfc00884c7b7ca878297bffe45fcb742c362b00b26ba37070706d44c3%40%3Cissues.hive.apache.org%3E cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2020-13956 cve-icon
https://priyankn.github.io/2021-02-26-CVE-2020-13956/ cve-icon
https://security.netapp.com/advisory/ntap-20220210-0002/ cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2020-13956 cve-icon
https://www.openwall.com/lists/oss-security/2020/10/08/4 cve-icon
https://www.oracle.com//security-alerts/cpujul2021.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpuApr2021.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpuapr2022.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpujan2022.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpuoct2021.html cve-icon cve-icon
History

Fri, 09 Oct 2026 09:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 01 Dec 2025 16:30:00 +0000

Type Values Removed Values Added
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2020-12-02T16:20:12.000Z

Updated: 2026-10-08T18:44:13.434Z

Reserved: 2020-06-08T00:00:00.000Z

Link: CVE-2020-13956

cve-icon Vulnrichment

Updated: 2025-12-01T15:45:49.435Z

cve-icon NVD

Status : Modified

Published: 2020-12-02T17:15:14.547

Modified: 2026-10-08T19:16:54.573

Link: CVE-2020-13956

cve-icon Redhat

Severity : Moderate

Publid Date: 2020-10-08T00:00:00Z

Links: CVE-2020-13956 - Bugzilla