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VulnerabilityPublished

CVE-2026-72590: alseambusher crontab-ui · CRLF Injection

Affects alseambusher crontab-uiSource CVE Database V5

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Not known to be exploited · CVSS 9.8 Critical.

Data as of 7 Nov 2026, 23:24 UTC

CVSS 3.1 base score
9.8Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
2.0% chance of exploitation in 30 days – higher than 81% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Aug 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 7 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
alseambushercrontab-uiAffected
  • <=0.4.2
Fixed in–

AI-suggested

Until a fix is available, restrict access to the /crontab endpoint and monitor for suspicious requests containing URL-encoded newline characters in the env_vars parameter.

Description

CVE-2026-72590 is a critical OS command injection vulnerability in alseambusher's crontab-ui up to version 0.4.2. It allows an unauthenticated remote attacker to inject arbitrary cron job entries by sending a specially crafted GET request with URL-encoded newline characters in the env_vars parameter to the /crontab endpoint.

References

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