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VulnerabilityPublished

CVE-2025-13397: mrubyc · CWE-404

Source GCVE Database

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Authoritative record:CVE-2025-13397· Medium 4.8

Not known to be exploited · CVSS 4.8 Medium.

Data as of 13 Nov 2026, 20:37 UTC

CVSS 4.0 base score
4.8Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulDB)CVSS 4.04.8
CNA (VulDB)CVSS 3.13.3
CNA (VulDB)CVSS 3.03.3
CNA (VulDB)CVSS 2.01.7
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 19 Nov 2025

  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 13 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
GitHubmrubyc/mrubycpkg:github/mrubyc/mrubycOther threatsAffected
  • 3.0 – 3.4
5 affected builds
Fixed in–

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

AI-suggested

A patch identified by commit 009111904807b8567262036bf45297c3da8f1c87 is recommended to remediate this issue. Since no official fixed versions or vendor advisory are provided, users should apply this patch or monitor the vendor for an official fix. No other mitigations are indicated.

Description

A low-severity security vulnerability (CVE-2025-13397) exists in mrubyc up to version 3.4. The flaw is in the function mrbc_raw_realloc within src/alloc.c, where manipulation of the pointer argument can cause a null pointer dereference. Exploitation requires local access and results in denial of service due to application crash. A patch identified by commit 009111904807b8567262036bf45297c3da8f1c87 is recommended to fix the issue.

References

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