biojppm rapidyaml up to 0.16.0 Annotation _add_annotation out-of-bounds write

Summaryinfo

A vulnerability, which was classified as problematic, was found in biojppm rapidyaml up to 0.16.0. This affects the function ParseEngine::_add_annotation of the component Annotation. Executing a manipulation can lead to out-of-bounds write. The identification of this vulnerability is CVE-2026-120455. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in biojppm rapidyaml up to 0.16.0 and classified as problematic. This vulnerability affects the function ParseEngine::_add_annotation of the component Annotation. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. The CWE definition for the vulnerability is CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect integrity, and availability. CVE summarizes:

rapidyaml through 0.16.0 contains an out-of-bounds write vulnerability in ParseEngine::_add_annotation() that allows attackers to corrupt memory by supplying YAML with excess anchors or tags. Attackers can submit YAML with consecutive anchors or tags to overflow the fixed two-element annotation array in release builds, corrupting stack memory and crashing the process.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-120455 since 11/02/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 11/02/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• biojppm

Name

• rapidyaml

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6
• 0.7
• 0.8
• 0.9
• 0.10
• 0.11
• 0.12
• 0.13
• 0.14
• 0.15
• 0.16.0

Website

• Product: https://github.com/biojppm/rapidyaml/

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