CVE-2016-10527: The riot-compiler version version 2.3.21 has an issue in a regex (Catastrophic Backtracking) thats make it unu

Q: How do I fix CVE-2016-10527?

riot-compiler: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Q: Is CVE-2016-10527 being exploited?

CVE-2016-10527 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-2016-10527 affect?

CVE-2016-10527 affects riot-compiler. Severity is high (CVSS 7.5). The riot-compiler version version 2.3.21 has an issue in a regex (Catastrophic Backtracking) thats make it unusable under certain conditions.

Q: How urgent is CVE-2016-10527?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.5REMOTEDOWNGRADE

CVE-2016-10527 is a high-severity flaw (CVSS 7.5) affecting riot-compiler. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The riot-compiler version version 2.3.21 has an issue in a regex (Catastrophic Backtracking) thats make it unusable under certain conditions.

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	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-400, CWE-399
Published	2018-05-31
Last modified	2026-06-17

Publisher (CNA): HackerOne · Vendor: riot.js

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

Am I affected?

Timeline

2018-05-31 20:29 UTCPublished CVE record published
2026-06-17 00:39 UTCUpdated Record last modified

riot.js riot-compiler DOWNGRADE

Affected: 2.3.21

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.3.21

1. Check installed version

npm ls riot-compiler

2. No fixed release: DOWNGRADE to a release before 2.3.21

npm view riot-compiler versions npm install riot-compiler@"<2.3.21"

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-2016-10527?

riot-compiler: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2016-10527 being exploited?

CVE-2016-10527 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-2016-10527 affect?

CVE-2016-10527 affects riot-compiler. Severity is high (CVSS 7.5). The riot-compiler version version 2.3.21 has an issue in a regex (Catastrophic Backtracking) thats make it unusable under certain conditions.

How urgent is CVE-2016-10527?

Priority 50/100. High severity; Remotely exploitable, no login, no user action

References

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