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VulnerabilityPublished

CVE-2026-101049: heymrun heym · Improper Authentication

Affects heymrun heymSource CVE Database V5

0
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Not known to be exploited · CVSS 8.3 High : upgrade to 0.0.53 soon.

Data as of 9 Nov 2026, 23:24 UTC

CVSS 4.0 base score
8.3High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 32% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.0.53
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.

What to do

Upgrade heym and heymrun/heym to 0.0.53.

Affected software

ProductAffectedFixed in
heymrunheymAffected
  • <0.0.53
Fixed in
  • 0.0.53
GitHubheymrun/heympkg:github/heymrun/heymOther threatsAffected
  • <0.0.53
Fixed in
  • 0.0.53

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade to heym version 0.0.53 or later where this issue is fixed. Since the vulnerability is resolved in version 0.0.53, applying this official fix is the recommended remediation.

Description

Heym versions before 0.0.53 contain an improper authentication vulnerability where Slack request signatures are not verified if trigger nodes lack credential IDs or have empty signing secrets. This allows remote unauthenticated attackers to send forged Slack events to known webhook URLs, potentially triggering workflows with the owner's credentials.

References

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