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CVE-2026-0864

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.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e7b4231be3490c65818fb9b76f4e29952668ab45ffabb5c703bff16978e41a1a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"CPython","repo":"https://github.com/python/cpython","vendor":"Python Software Foundation","versions":[{"lessThan":"3.15.0b4","status":"affected","version":"0","versionType":"python"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":4.1,"baseSeverity":"MEDIUM","exploitMaturity":"NOT_DEFINED","privilegesRequired":"HIGH","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImp…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-74","description":"CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

7 source assertions
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/0adb386f6e68eb2e73d32e19f235d012df009528"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/cna/references/4
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/5858e42c539dac8394636a6e9b30472b8994851f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/cna/references/3
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/71f2e02a52d47417a6fd69f456346cd8aa7aca98"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/cna/references/5
{"tags":["patch"],"url":"https://github.com/python/cpython/commit/aaf850fd333cd89e9aada03d92aaa788a6cb1bb8"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/cna/references/6
{"tags":["issue-tracking"],"url":"https://github.com/python/cpython/issues/143927"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/cna/references/2
{"tags":["patch"],"url":"https://github.com/python/cpython/pull/151559"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/cna/references/0
{"tags":["vendor-advisory"],"url":"https://mail.python.org/archives/list/security-announce@python.org/thread/CV4NE6AFCRJL7XQOHX7J5TSDHUWVWGJS/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:3bc5c3f2912e0270eef74384bea09ccb1c2228960f759ade3d5cf041c7f8ddf4 · sha256:9de73b6f0b6e78fe… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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