SHA-1 is not collision resistant, which makes it easier for context-dependent attackers…
Priority LOW 28CWE-327Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-327.
Summary
SHA-1 is not collision resistant, which makes it easier for context-dependent attackers to conduct spoofing attacks, as demonstrated by attacks on the use of SHA-1 in TLS 1.2. NOTE: this CVE exists to provide a common identifier for referencing this SHA-1 issue; the existence of an identifier is not, by itself, a technology recommendation.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00894 59th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2005-4900
- 2026-10-03 Alias added: GHSA-xj59-9qjv-fr54
References
Advisory 5
Other 5
- http://shattered.io/
- http://www.cwi.nl/news/2017/cwi-and-google-announce-first-collision-industry-security-standard-sha-1
- https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html
- https://arstechnica.com/security/2017/02/at-deaths-door-for-years-widely-used-sha1-function-is-now-dead/
- https://kc.mcafee.com/corporate/index?page=content&id=SB10340
More Google Chrome vulnerabilities
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- TI-2024-04898 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
- TI-2024-04600 Type confusion in Google Chrome KEVCVSS 3.1CRITICAL 9.6
- TI-2024-04346 Use after free in Google Chrome KEVCVSS 3.1CRITICAL 9.6
- TI-2023-05824 Integer overflow in Google Chrome KEVCVSS 3.1CRITICAL 9.6
Sources
- CVE-2005-4900 · CVE Program
- CVE-2005-4900 · NVD
- FIRST EPSS
- GHSA-xj59-9qjv-fr54 · GitHub Advisory Database · CC BY 4.0
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