HighFix available
python2, python3 — security advisory
python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking in the difflib.IS_LINE_JUNK method. An attacker could use this flaw to cause denial of service.
- Products
- python2, python3
- Affected versions
- Not specified
- Fixed versions
- 2.7.15-r0, 3.5.6-r0, 3.6.5-r0, 3.6.6-r0
- CVEs
- CVE-2018-1061
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 22:08 UTC · Revision 1
Source evidence
python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking in the difflib.IS_LINE_JUNK method. An attacker could use this flaw to cause denial of service.
osv:ALPINE-CVE-2018-1061
python2
Fixed versions: 2.7.15-r0
python2
Fixed versions: 2.7.15-r0
python2
Fixed versions: 2.7.15-r0
python2
Fixed versions: 2.7.15-r0
python2
Fixed versions: 2.7.15-r0
python2
Fixed versions: 2.7.15-r0
python2
Fixed versions: 2.7.15-r0
python3
Fixed versions: 3.5.6-r0
python3
Fixed versions: 3.6.5-r0
python3
Fixed versions: 3.6.5-r0
python3
Fixed versions: 3.6.6-r0
Complete source record
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"modified": "2026-10-23T17:23:31.871276242Z",
"provider": "osv",
"upstream": [
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"references": [
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"security_relevant": true,
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"source_id": "core-osv",
"document_id": 415692,
"published_at": "2018-06-19T12:29:00.22+00:00"
}