CVE Explorer
CVE-2026-27171
zlib before 1.3.2 allows CPU consumption via crc32_combine64 and crc32_combine_gen64 because x2nmodp can do right shifts within a loop that has no termination condition.
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","product":"zlib","vendor":"zlib","versions":[{"lessThan":"1.3.2","status":"affected","version":"0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:4aa3fa5e3d6f2756737c9e8f3b22ef2af6d78d8506b11a5d0f841a4d7f75c098 · sha256:0f92ec672ae169df… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":2.9,"baseSeverity":"LOW","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:4aa3fa5e3d6f2756737c9e8f3b22ef2af6d78d8506b11a5d0f841a4d7f75c098 · sha256:0f92ec672ae169df… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-1284","description":"CWE-1284 Improper Validation of Specified Quantity in Input","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:4aa3fa5e3d6f2756737c9e8f3b22ef2af6d78d8506b11a5d0f841a4d7f75c098 · sha256:0f92ec672ae169df… · /containers/cna/problemTypes/0/descriptions/0
Source references
6 source assertions{"url":"https://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4aa3fa5e3d6f2756737c9e8f3b22ef2af6d78d8506b11a5d0f841a4d7f75c098 · sha256:0f92ec672ae169df… · /containers/cna/references/2
{"tags":["exploit"],"url":"https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4aa3fa5e3d6f2756737c9e8f3b22ef2af6d78d8506b11a5d0f841a4d7f75c098 · sha256:0f92ec672ae169df… · /containers/adp/0/references/0
{"url":"https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4aa3fa5e3d6f2756737c9e8f3b22ef2af6d78d8506b11a5d0f841a4d7f75c098 · sha256:0f92ec672ae169df… · /containers/cna/references/1
{"url":"https://github.com/madler/zlib/issues/904"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4aa3fa5e3d6f2756737c9e8f3b22ef2af6d78d8506b11a5d0f841a4d7f75c098 · sha256:0f92ec672ae169df… · /containers/cna/references/0
{"url":"https://github.com/madler/zlib/releases/tag/v1.3.2"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4aa3fa5e3d6f2756737c9e8f3b22ef2af6d78d8506b11a5d0f841a4d7f75c098 · sha256:0f92ec672ae169df… · /containers/cna/references/4
{"url":"https://ostif.org/zlib-audit-complete/"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4aa3fa5e3d6f2756737c9e8f3b22ef2af6d78d8506b11a5d0f841a4d7f75c098 · sha256:0f92ec672ae169df… · /containers/cna/references/3
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.