CVE-2026-0864 (GCVE-0-2026-0864)

Vulnerability from cvelistv5 – Published: 2026-06-23 17:42 – Updated: 2026-08-13 00:29
VLAI
Title
Configuration Injection via Carriage Return (\r) in write() method
Summary
When using the "configparser" module to write configuration files containing multi-line text values with carriage return characters (\r) the resulting file could be injected with unexpected keys and values if the attacker controls the written value.
Severity
4.1 (Medium)
CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-23 18:34 UTC
CWE
  • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
Python Software Foundation CPython Affected: 0 , < 3.10.21 (python)
Affected: 3.11.0 , < 3.11.16 (python)
Affected: 3.12.0 , < 3.12.14 (python)
Affected: 3.13.0 , < 3.13.15 (python)
Affected: 3.14.0 , < 3.14.7 (python)
Affected: 3.15.0a1 , < 3.15.0b4 (python)
guessed Create a notification for this product.
Credits
D0n9 (https://github.com/D0n9) Petr Viktorin (https://github.com/encukou) Seth Larson (https://github.com/sethmlarson)
Show details on NVD website
To clipboard 

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      "cveMetadata": "{\"cveId\": \"CVE-2026-0864\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-13T00:29:03.258Z\", \"dateReserved\": \"2026-01-12T16:07:55.453Z\", \"assignerOrgId\": \"28c92f92-d60d-412d-b760-e73465c3df22\", \"datePublished\": \"2026-06-23T17:42:01.947Z\", \"assignerShortName\": \"PSF\"}",
      "dataType": "CVE_RECORD",
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    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.