CVE-2025-11683

CVE-2025-11683 is a medium-severity vulnerability in Toddr Yaml with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Description

YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure Missing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read The issue is seen with complex YAML files with a hash of all keys and empty values.  There is no indication that the issue leads to accessing memory outside that allocated to the module.

Frequently asked questions

What is CVE-2025-11683?
YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure Missing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read The issue is seen with complex YAML files with a hash of all keys and empty values.  There is no indication that the issue leads to accessing memory outside that allocated to the module.
How severe is CVE-2025-11683?
CVE-2025-11683 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2025-11683 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-11683?
CVE-2025-11683 affects Toddr Yaml. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-11683?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-11683 have an EU (EUVD) identifier?
Yes. CVE-2025-11683 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-34701.
When was CVE-2025-11683 published?
CVE-2025-11683 was published on 2025-10-16 and last updated on 2026-06-17.

References

Affected products (1)

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