Critical
Security advisory
An issue was discovered in Oniguruma 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP through 7.1.5. A heap out-of-bounds write or read occurs in next_state_val() during regular expression compilation. Octal numbers larger than 0xff are not handled correctly in fetch_token() and fetch_token_in_cc(). A malformed regular expression containing an octal number in the form of '\700' would produce an invalid code point value larger than 0xff in next_state_val(), resulting in an out-of-bounds write memory corruption.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2017-9226
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 09:11 UTC · Revision 1
Source evidence
An issue was discovered in Oniguruma 6.2.0, as used in Oniguruma-mod in Ruby through 2.4.1 and mbstring in PHP through 7.1.5. A heap out-of-bounds write or read occurs in next_state_val() during regular expression compilation. Octal numbers larger than 0xff are not handled correctly in fetch_token() and fetch_token_in_cc(). A malformed regular expression containing an octal number in the form of '\700' would produce an invalid code point value larger than 0xff in next_state_val(), resulting in an out-of-bounds write memory corruption.
osv:CVE-2017-9226
Complete source record
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"url": "https://osv.dev/vulnerability/CVE-2017-9226",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2017-9226",
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"provider": "osv",
"references": [
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"https://github.com/kkos/oniguruma/commit/b4bf968ad52afe14e60a2dc8a95d3555c543353a",
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"source_id": "core-osv",
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"published_at": "2017-05-24T15:29:00.277+00:00"
}