CVE-2016-10686: fis-sass-all is another libsass wrapper for node

Q: How do I fix CVE-2016-10686?

fis-sass-all: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2016-10686 being exploited?

CVE-2016-10686 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-2016-10686 affect?

CVE-2016-10686 affects fis-sass-all. Severity is high (CVSS 8.1). fis-sass-all is another libsass wrapper for node. fis-sass-all downloads binary resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution (RCE) by swapping out the requested resources

Q: How urgent is CVE-2016-10686?

Priority 54/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 8.1REMOTEDOWNGRADE

CVE-2016-10686 is a high-severity flaw (CVSS 8.1) affecting fis-sass-all. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

fis-sass-all is another libsass wrapper for node. fis-sass-all downloads binary resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution (RCE) by swapping out the requested resources with an attacker controlled copy if the attacker is on the network or positioned in between the user and the remote server.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.1% (top 19%)
CISA exploited list	No
Weakness	CWE-311, CWE-310
Published	2018-06-04
Last modified	2026-06-17

Publisher (CNA): HackerOne · Vendor: fis-sass-all project

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

Am I affected?

Timeline

2018-06-04 16:29 UTCPublished CVE record published
2026-06-17 00:40 UTCUpdated Record last modified

fis-sass-all project fis-sass-all DOWNGRADE

Affected: 0.2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.0

1. Check installed version

npm ls fis-sass-all

2. No fixed release: DOWNGRADE to a release before 0.2.0

npm view fis-sass-all versions npm install fis-sass-all@"<0.2.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2016-10686?

fis-sass-all: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-10686 being exploited?

CVE-2016-10686 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-2016-10686 affect?

CVE-2016-10686 affects fis-sass-all. Severity is high (CVSS 8.1). fis-sass-all is another libsass wrapper for node. fis-sass-all downloads binary resources over HTTP, which leaves it vulnerable to MITM attacks. It may be possible to cause remote code execution (RCE) by swapping out the requested resources

How urgent is CVE-2016-10686?

Priority 54/100. High severity; Remotely exploitable, no login, no user action

References

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