CVE-2005-4900
SHA-1 is not collision resistant, which makes it easier for context-dependent attackers to conduct spoofing attacks, as demonstrated by…
- 5.9MediumCVSS base score
- 0.89%Exploitation in 30 daysEPSS · top 40% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By mitre
Published
- 10 years later
· 10 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
| NVDNVD · Modified | 3.1 | Medium5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.89% · top 40% of all CVEs (9 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.
Affected products
n/a
- affected n/a
References
11
- https://sites.google.com/site/itstheshappening (opens in a new tab)x_refsource_MISCx_transferred
- 12577 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://shattered.io/ (opens in a new tab)x_refsource_MISCx_transferred
- https://www.schneier.com/blog/archives/2005/08/new_cryptanalyt.html (opens in a new tab)x_refsource_MISCx_transferred
- http://www.cwi.nl/news/2017/cwi-and-google-announce-first-collision-industry-security-standard-sha-1 (opens in a new tab)x_refsource_MISCx_transferred
- http://ia.cr/2007/474 (opens in a new tab)x_refsource_MISCx_transferred
- https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html (opens in a new tab)x_refsource_MISCx_transferred
- https://security.googleblog.com/2015/12/an-update-on-sha-1-certificates-in.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.schneier.com/blog/archives/2005/02/sha1_broken.html (opens in a new tab)x_refsource_MISCx_transferred
- https://arstechnica.com/security/2017/02/at-deaths-door-for-years-widely-used-sha1-function-is-now-dead/ (opens in a new tab)x_refsource_MISCx_transferred
- https://kc.mcafee.com/corporate/index?page=content&id=SB10340 (opens in a new tab)x_refsource_CONFIRMx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2005-4891 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2005-4900)Record last updated .