Baitaphish
Security intelligence
SearchLatest briefing
CVE Explorer

CVE-2026-29076

cpp-httplib is a C++11 single-file header-only cross platform HTTP/HTTPS library. Prior to version 0.37.0, cpp-httplib uses std::regex (libstdc++) to parse RFC 5987 encoded filename* values in multipart Content-Disposition headers. The regex engine in libstdc++ implements backtracking via deep recursion, consuming one stack frame per input character. An attacker can send a single HTTP POST request with a crafted filename* parameter that causes uncontrolled stack growth, resulting in a stack over
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e8c18def2aeb816b8ef998db0a1a676f10273d5ab6090be736f2ea1095ce249f
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-674","description":"CWE-674: Uncontrolled Recursion","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:846775ff717dd71a9cd18ee19e0a2652bf86b294023495cece994e1a116e5d09 · sha256:017af03b9d10391c… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:846775ff717dd71a9cd18ee19e0a2652bf86b294023495cece994e1a116e5d09 · sha256:017af03b9d10391c… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"cpp-httplib","vendor":"yhirose","versions":[{"status":"affected","version":"< 0.37.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:846775ff717dd71a9cd18ee19e0a2652bf86b294023495cece994e1a116e5d09 · sha256:017af03b9d10391c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:846775ff717dd71a9cd18ee19e0a2652bf86b294023495cece994e1a116e5d09 · sha256:017af03b9d10391c… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-674","description":"CWE-674: Uncontrolled Recursion","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:846775ff717dd71a9cd18ee19e0a2652bf86b294023495cece994e1a116e5d09 · sha256:017af03b9d10391c… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-1333","description":"CWE-1333: Inefficient Regular Expression Complexity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:846775ff717dd71a9cd18ee19e0a2652bf86b294023495cece994e1a116e5d09 · sha256:017af03b9d10391c… · /containers/cna/problemTypes/1/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/yhirose/cpp-httplib/commit/de296af3eb5b0d5c116470e033db900e4812c5e6","tags":["x_refsource_MISC"],"url":"https://github.com/yhirose/cpp-httplib/commit/de296af3eb5b0d5c116470e033db900e4812c5e6"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:846775ff717dd71a9cd18ee19e0a2652bf86b294023495cece994e1a116e5d09 · sha256:017af03b9d10391c… · /containers/cna/references/1
{"name":"https://github.com/yhirose/cpp-httplib/releases/tag/v0.37.0","tags":["x_refsource_MISC"],"url":"https://github.com/yhirose/cpp-httplib/releases/tag/v0.37.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:846775ff717dd71a9cd18ee19e0a2652bf86b294023495cece994e1a116e5d09 · sha256:017af03b9d10391c… · /containers/cna/references/2
{"name":"https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qq6v-r583-3h69","tags":["x_refsource_CONFIRM"],"url":"https://github.com/yhirose/cpp-httplib/security/advisories/GHSA-qq6v-r583-3h69"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:846775ff717dd71a9cd18ee19e0a2652bf86b294023495cece994e1a116e5d09 · sha256:017af03b9d10391c… · /containers/cna/references/0

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.

← Back to CVE Explorer