Apache Commons Codec up to 1.22.0 Git Entry Name GitIdentifiers deserialization

Summaryinfo

A vulnerability described as problematic has been identified in Apache Commons Codec up to 1.22.0. Affected by this issue is the function GitIdentifiers of the component Git Entry Name Handler. The manipulation results in deserialization. This vulnerability was named CVE-2026-124077. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in Apache Commons Codec up to 1.22.0. Affected is the function GitIdentifiers of the component Git Entry Name Handler. The manipulation with an unknown input leads to a deserialization vulnerability. CWE is classifying the issue as CWE-502. The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid. This is going to have an impact on integrity. CVE summarizes:

The GitIdentifiers class in Apache Commons Codec did not reject NUL bytes in tree entry names. Because Git uses a NUL byte to mark the end of each entry name in a tree object, a crafted name could make one tree serialize to the same bytes as a different tree. Two different directory trees could then receive the same Git tree identifier or SWHID. The impact is limited: common file systems do not allow NUL bytes in file names, so trees built by walking a file system are not affected. Only applications that build trees from names supplied by other sources, such as entries of archive formats that permit NUL bytes in names (e.g. ZIP) or names passed directly to the API, are exposed. This issue affects Apache Commons Codec: from 1.22.0 before 1.23.0. Users are recommended to upgrade to version 1.23.0, which fixes the issue.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-124077 since 11/06/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. 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 11/09/2026).

Upgrading to version 1.23.0 eliminates this vulnerability.

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Productinfo

Vendor

• Apache

Name

• Commons Codec

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22.0

License

• open-source

Website

• Vendor: https://www.apache.org/

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