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Lookup for vulnerable packages by Package URL.

Purlpkg:apk/alpine/syncthing@1.15.1-r0?arch=armhf&distroversion=v3.21&reponame=community
Typeapk
Namespacealpine
Namesyncthing
Version1.15.1-r0
Qualifiers
arch armhf
distroversion v3.21
reponame community
Subpath
Is_vulnerablefalse
Next_non_vulnerable_versionnull
Latest_non_vulnerable_versionnull
Affected_by_vulnerabilities
Fixing_vulnerabilities
0
url VCID-2g3d-77m4-qubh
vulnerability_id VCID-2g3d-77m4-qubh
summary Syncthing is a continuous file synchronization program. In Syncthing before version 1.15.0, the relay server `strelaysrv` can be caused to crash and exit by sending a relay message with a negative length field. Similarly, Syncthing itself can crash for the same reason if given a malformed message from a malicious relay server when attempting to join the relay. Relay joins are essentially random (from a subset of low latency relays) and Syncthing will by default restart when crashing, at which point it's likely to pick another non-malicious relay. This flaw is fixed in version 1.15.0.
references
0
reference_url https://api.first.org/data/v1/epss?cve=CVE-2021-21404
reference_id
reference_type
scores
0
value 0.00251
scoring_system epss
scoring_elements 0.48659
published_at 2026-06-04T12:55:00Z
url https://api.first.org/data/v1/epss?cve=CVE-2021-21404
1
reference_url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21404
reference_id
reference_type
scores
url https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21404
2
reference_url https://github.com/syncthing/syncthing/commit/fb4fdaf4c0a79c22cad000c42ac1394e3ccb6a97
reference_id
reference_type
scores
0
value 7.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1
value LOW
scoring_system generic_textual
scoring_elements
url https://github.com/syncthing/syncthing/commit/fb4fdaf4c0a79c22cad000c42ac1394e3ccb6a97
3
reference_url https://github.com/syncthing/syncthing/releases/tag/v1.15.0
reference_id
reference_type
scores
0
value 7.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1
value LOW
scoring_system generic_textual
scoring_elements
url https://github.com/syncthing/syncthing/releases/tag/v1.15.0
4
reference_url https://github.com/syncthing/syncthing/security/advisories/GHSA-x462-89pf-6r5h
reference_id
reference_type
scores
0
value 7.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1
value LOW
scoring_system generic_textual
scoring_elements
url https://github.com/syncthing/syncthing/security/advisories/GHSA-x462-89pf-6r5h
5
reference_url https://nvd.nist.gov/vuln/detail/CVE-2021-21404
reference_id
reference_type
scores
0
value 7.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1
value LOW
scoring_system generic_textual
scoring_elements
url https://nvd.nist.gov/vuln/detail/CVE-2021-21404
6
reference_url https://pkg.go.dev/github.com/syncthing/syncthing
reference_id
reference_type
scores
0
value 7.5
scoring_system cvssv3.1
scoring_elements CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
1
value LOW
scoring_system generic_textual
scoring_elements
url https://pkg.go.dev/github.com/syncthing/syncthing
7
reference_url https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=986593
reference_id 986593
reference_type
scores
url https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=986593
8
reference_url https://security.archlinux.org/AVG-1778
reference_id AVG-1778
reference_type
scores
0
value Medium
scoring_system archlinux
scoring_elements
url https://security.archlinux.org/AVG-1778
fixed_packages
0
url pkg:apk/alpine/syncthing@1.15.1-r0?arch=armhf&distroversion=v3.21&reponame=community
purl pkg:apk/alpine/syncthing@1.15.1-r0?arch=armhf&distroversion=v3.21&reponame=community
is_vulnerable false
affected_by_vulnerabilities
resource_url http://public2.vulnerablecode.io/packages/pkg:apk/alpine/syncthing@1.15.1-r0%3Farch=armhf&distroversion=v3.21&reponame=community
aliases CVE-2021-21404, GHSA-x462-89pf-6r5h
risk_score 3.4
exploitability 0.5
weighted_severity 6.8
resource_url http://public2.vulnerablecode.io/vulnerabilities/VCID-2g3d-77m4-qubh
Risk_scorenull
Resource_urlhttp://public2.vulnerablecode.io/packages/pkg:apk/alpine/syncthing@1.15.1-r0%3Farch=armhf&distroversion=v3.21&reponame=community