CWE-135

Incorrect Calculation of Multi-Byte String Length

The product does not correctly calculate the length of strings that can contain wide or multi-byte characters.

CVE-2026-0810 (GCVE-0-2026-0810)

Vulnerability from cvelistv5 – Published: 2026-01-26 19:36 – Updated: 2026-03-04 19:05
VLAI?
Title
Gix-date: gix-date: undefined behavior due to invalid string generation
Summary
A flaw was found in gix-date. The `gix_date::parse::TimeBuf::as_str` function can generate strings containing invalid non-UTF8 characters. This issue violates the internal safety invariants of the `TimeBuf` component, leading to undefined behavior when these malformed strings are subsequently processed. This could potentially result in application instability or other unforeseen consequences.
Severity ?
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-135 - Incorrect Calculation of Multi-Byte String Length
Assigner
References
Impacted products
Vendor Product Version
GitoxideLabs gitoxide Affected: 0 , < 0.12.0 (semver)
Create a notification for this product.
Date Public ?
2025-12-29 12:00
Show details on NVD website
To clipboard 

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CVE-2026-34831 (GCVE-0-2026-34831)

Vulnerability from cvelistv5 – Published: 2026-04-02 16:43 – Updated: 2026-04-03 17:48
VLAI?
Title
Rack: Content-Length mismatch in Rack::Files error responses
Summary
Rack is a modular Ruby web server interface. Prior to versions 2.2.23, 3.1.21, and 3.2.6, Rack::Files#fail sets the Content-Length response header using String#size instead of String#bytesize. When the response body contains multibyte UTF-8 characters, the declared Content-Length is smaller than the number of bytes actually sent on the wire. Because Rack::Files reflects the requested path in 404 responses, an attacker can trigger this mismatch by requesting a non-existent path containing percent-encoded UTF-8 characters. This results in incorrect HTTP response framing and may cause response desynchronization in deployments that rely on the incorrect Content-Length value. This issue has been patched in versions 2.2.23, 3.1.21, and 3.2.6.
Severity ?
4.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CWE
  • CWE-130 - Improper Handling of Length Parameter Inconsistency
  • CWE-135 - Incorrect Calculation of Multi-Byte String Length
Assigner
References
Impacted products
Vendor Product Version
rack rack Affected: < 2.2.23
Affected: >= 3.0.0.beta1, < 3.1.21
Affected: >= 3.2.0, < 3.2.6
Create a notification for this product.
Show details on NVD website
To clipboard 

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Mitigation

Phase: Implementation

Strategy: Input Validation

Description:

  • Always verify the length of the string unit character.
Mitigation

Phase: Implementation

Strategy: Libraries or Frameworks

Description:

  • Use length computing functions (e.g. strlen, wcslen, etc.) appropriately with their equivalent type (e.g.: byte, wchar_t, etc.)

No CAPEC attack patterns related to this CWE.

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