CVE-2017-5887: WebSocket.swift in Starscream before 2.0.4 allows an SSL Pinning bypass because pinning occurs in the stream f

Q: How do I fix CVE-2017-5887?

starscream: upgrade to newer than 2.0.3. Exact commands for each OS are on this page.

Q: Is CVE-2017-5887 being exploited?

CVE-2017-5887 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2017-5887 affect?

CVE-2017-5887 affects starscream. Severity is high (CVSS 7.5). WebSocket.swift in Starscream before 2.0.4 allows an SSL Pinning bypass because pinning occurs in the stream function (this is too late; pinning should occur in the initStreamsWithData function).

Q: How urgent is CVE-2017-5887?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEUPGRADE

CVE-2017-5887 is a high-severity flaw (CVSS 7.5) affecting starscream. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WebSocket.swift in Starscream before 2.0.4 allows an SSL Pinning bypass because pinning occurs in the stream function (this is too late; pinning should occur in the initStreamsWithData function).

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 28%)
CISA exploited list	No
Weakness	CWE-295
Published	2017-04-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: starscream project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2017-04-06 14:59 UTCPublished CVE record published
2026-06-17 01:21 UTCUpdated Record last modified

starscream project starscream UPGRADE

Affected: <= 2.0.3

Fixed in: newer than 2.0.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy starscream || rpm -q starscream || starscream --version

2. UPGRADE to newer than 2.0.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade starscream

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade starscream

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2017-5887?

starscream: upgrade to newer than 2.0.3. Exact commands for each OS are on this page.

Is CVE-2017-5887 being exploited?

CVE-2017-5887 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2017-5887 affect?

CVE-2017-5887 affects starscream. Severity is high (CVSS 7.5). WebSocket.swift in Starscream before 2.0.4 allows an SSL Pinning bypass because pinning occurs in the stream function (this is too late; pinning should occur in the initStreamsWithData function).

How urgent is CVE-2017-5887?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

Software pages

Swift vulnerabilities

Related CVEs

CVE-2017-7192 HIGH 7.5 UPGRADE WebSocket.swift in Starscream before 2.0.4 allows an SSL Pinning bypass because of incorrect management of the

References

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