CVE-2026-42482
CVE-2026-42482 is a critical-severity vulnerability in Hashcat with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- EPSS exploit prediction: 0% (32nd percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-26529
- Weakness: CWE-787
- Affected product: Hashcat
- Published:
- Last modified:
Description
A stack-based buffer overflow in mangle_to_hex_lower() and mangle_to_hex_upper() in src/rp_cpu.c in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted rule file, or via the -j or -k rule options used with password candidates of 128 or more characters. The vulnerability is caused by a bounds check that fails to account for the 2x expansion that occurs when password bytes are converted to hexadecimal.
Frequently asked questions
- What is CVE-2026-42482?
- A stack-based buffer overflow in mangle_to_hex_lower() and mangle_to_hex_upper() in src/rp_cpu.c in hashcat v7.1.2 allows an attacker to cause a denial of service or possibly execute arbitrary code via a crafted rule file, or via the -j or -k rule options used with password candidates of 128 or more characters. The vulnerability is caused by a bounds check that fails to account for the 2x expansion that occurs when password bytes are converted to hexadecimal.
- How severe is CVE-2026-42482?
- CVE-2026-42482 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-42482 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-42482?
- CVE-2026-42482 affects Hashcat. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-42482?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- Does CVE-2026-42482 have an EU (EUVD) identifier?
- Yes. CVE-2026-42482 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-26529.
- When was CVE-2026-42482 published?
- CVE-2026-42482 was published on 2026-05-01 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:hashcat:hashcat:7.1.2:*:*:*:*:*:*:*
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