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Vulnerability details: VCID-nu43-4dyc-tbhy
Vulnerability ID VCID-nu43-4dyc-tbhy
Aliases CVE-2021-21348
GHSA-56p8-3fh9-4cvq
Summary
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (5)
CWE-1333 Inefficient Regular Expression Complexity
CWE-400 Uncontrolled Resource Consumption
CWE-502 Deserialization of Untrusted Data
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-21348.json
epss 0.00256 https://api.first.org/data/v1/epss?cve=CVE-2021-21348
epss 0.00256 https://api.first.org/data/v1/epss?cve=CVE-2021-21348
cvssv3.1 5.9 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-56p8-3fh9-4cvq
cvssv3.1 5.3 https://github.com/x-stream/xstream
generic_textual MODERATE https://github.com/x-stream/xstream
cvssv3.1 5.3 https://github.com/x-stream/xstream/security/advisories/GHSA-56p8-3fh9-4cvq
cvssv3.1_qr MODERATE https://github.com/x-stream/xstream/security/advisories/GHSA-56p8-3fh9-4cvq
generic_textual MODERATE https://github.com/x-stream/xstream/security/advisories/GHSA-56p8-3fh9-4cvq
cvssv3.1 5.3 https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%3Cusers.activemq.apache.org%3E
generic_textual MODERATE https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%3Cusers.activemq.apache.org%3E
cvssv3.1 5.3 https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E
generic_textual MODERATE https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E
cvssv3.1 5.3 https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html
generic_textual MODERATE https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html
cvssv3.1 5.3 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP
generic_textual MODERATE https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP
cvssv3.1 5.3 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7
generic_textual MODERATE https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7
cvssv3.1 5.3 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB
generic_textual MODERATE https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB
cvssv3.1 5.3 https://nvd.nist.gov/vuln/detail/CVE-2021-21348
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-21348
cvssv3.1 5.3 https://security.netapp.com/advisory/ntap-20210430-0002
generic_textual MODERATE https://security.netapp.com/advisory/ntap-20210430-0002
cvssv3.1 5.3 https://www.debian.org/security/2021/dsa-5004
generic_textual MODERATE https://www.debian.org/security/2021/dsa-5004
cvssv3.1 5.3 https://www.oracle.com/security-alerts/cpujan2022.html
generic_textual MODERATE https://www.oracle.com/security-alerts/cpujan2022.html
cvssv3.1 5.3 https://www.oracle.com//security-alerts/cpujul2021.html
generic_textual MODERATE https://www.oracle.com//security-alerts/cpujul2021.html
cvssv3.1 5.3 https://www.oracle.com/security-alerts/cpuoct2021.html
generic_textual MODERATE https://www.oracle.com/security-alerts/cpuoct2021.html
cvssv3.1 5.3 https://x-stream.github.io/CVE-2021-21348.html
generic_textual MODERATE https://x-stream.github.io/CVE-2021-21348.html
cvssv3.1 5.3 https://x-stream.github.io/security.html#workaround
generic_textual MODERATE https://x-stream.github.io/security.html#workaround
cvssv3.1 5.3 http://x-stream.github.io/changes.html#1.4.16
generic_textual MODERATE http://x-stream.github.io/changes.html#1.4.16
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-21348.json
https://api.first.org/data/v1/epss?cve=CVE-2021-21348
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21348
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/x-stream/xstream
https://github.com/x-stream/xstream/security/advisories/GHSA-56p8-3fh9-4cvq
https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%3Cusers.activemq.apache.org%3E
https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E
https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/
https://nvd.nist.gov/vuln/detail/CVE-2021-21348
https://security.netapp.com/advisory/ntap-20210430-0002
https://security.netapp.com/advisory/ntap-20210430-0002/
https://x-stream.github.io/CVE-2021-21348.html
https://x-stream.github.io/security.html#workaround
http://x-stream.github.io/changes.html#1.4.16
1942633 https://bugzilla.redhat.com/show_bug.cgi?id=1942633
985843 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=985843
GHSA-56p8-3fh9-4cvq https://github.com/advisories/GHSA-56p8-3fh9-4cvq
RHSA-2021:2139 https://access.redhat.com/errata/RHSA-2021:2139
RHSA-2021:2475 https://access.redhat.com/errata/RHSA-2021:2475
RHSA-2021:2476 https://access.redhat.com/errata/RHSA-2021:2476
RHSA-2021:4767 https://access.redhat.com/errata/RHSA-2021:4767
RHSA-2021:4918 https://access.redhat.com/errata/RHSA-2021:4918
RHSA-2021:5134 https://access.redhat.com/errata/RHSA-2021:5134
USN-4943-1 https://usn.ubuntu.com/4943-1/
USN-6978-1 https://usn.ubuntu.com/6978-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-21348.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/x-stream/xstream
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://github.com/x-stream/xstream/security/advisories/GHSA-56p8-3fh9-4cvq
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://lists.apache.org/thread.html/r8244fd0831db894d5e89911ded9c72196d395a90ae655414d23ed0dd@%3Cusers.activemq.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

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none

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required

unchanged

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://lists.apache.org/thread.html/r9ac71b047767205aa22e3a08cb33f3e0586de6b2fac48b425c6e16b0@%3Cdev.jmeter.apache.org%3E
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

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physical

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://lists.debian.org/debian-lts-announce/2021/04/msg00002.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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required

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-21348
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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unchanged

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://security.netapp.com/advisory/ntap-20210430-0002
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

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required

unchanged

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low

none

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://www.debian.org/security/2021/dsa-5004
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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required

unchanged

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none

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://www.oracle.com/security-alerts/cpujan2022.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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unchanged

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://www.oracle.com//security-alerts/cpujul2021.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://www.oracle.com/security-alerts/cpuoct2021.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://x-stream.github.io/CVE-2021-21348.html
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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none

required

unchanged

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none

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none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at https://x-stream.github.io/security.html#workaround
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

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unchanged

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H Found at http://x-stream.github.io/changes.html#1.4.16
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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unchanged

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Exploit Prediction Scoring System (EPSS)
Percentile 0.49256
EPSS Score 0.00256
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-10T18:07:55.296731+00:00 SUSE Severity Score Importer Import https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml 38.6.0