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.
CVE-2005-4900
Score 5.9 from GitHub Security Advisory published 2022-05-01. NVD baseline CVSS 5.9; sources differ by 0.0.
- Lower severity and no public exploit yet
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.9
- EG Score
- 5.9(medium)
- EPSS
- 56.7%
- KEV
- Not listed
Published
October 14, 2016
Last Modified
May 22, 2026
References (22)
- cve@mitrehttp://ia.cr/2007/474
- cve@mitrehttp://shattered.io/
- cve@mitrehttp://www.cwi.nl/news/2017/cwi-and-google-announce-first-collision-industry-security-standard-sha-1
- cve@mitrehttp://www.securityfocus.com/bid/12577
- cve@mitrehttps://arstechnica.com/security/2017/02/at-deaths-door-for-years-widely-used-sha1-function-is-now-dead/
- cve@mitrehttps://kc.mcafee.com/corporate/index?page=content&id=SB10340
- cve@mitrehttps://security.googleblog.com/2015/12/an-update-on-sha-1-certificates-in.html
- cve@mitrehttps://security.googleblog.com/2017/02/announcing-first-sha1-collision.html
- cve@mitrehttps://sites.google.com/site/itstheshappening
- cve@mitrehttps://www.schneier.com/blog/archives/2005/02/sha1_broken.html
- cve@mitrehttps://www.schneier.com/blog/archives/2005/08/new_cryptanalyt.html
- af854a3a-2127-422b-91ae-364da2661108http://ia.cr/2007/474
- af854a3a-2127-422b-91ae-364da2661108http://shattered.io/
- af854a3a-2127-422b-91ae-364da2661108http://www.cwi.nl/news/2017/cwi-and-google-announce-first-collision-industry-security-standard-sha-1
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/12577
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 5× in last 7d / 30× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-11 08:22 UTCEPSS rescore
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- 2026-05-22 18:18 UTCEG score recompute
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Related CVEs(same CWE)
Same CWE
10 shownCWE-326 · CWE-327
- CVE-2013-7287EG 9.8CRITICAL
- CVE-2013-2166EG 9.8CRITICAL
- CVE-2011-4121EG 9.8CRITICAL
- CVE-2018-0448EG 9.8CRITICAL
- CVE-2015-9235EG 9.8EPSS 94%CRITICAL
- CVE-2017-1000486EG 9.8 KEVEPSS 100%CRITICAL
- CVE-2017-11317EG 9.8 KEVEPSS 100%CRITICAL
- CVE-2017-7903EG 9.8CRITICAL
- CVE-2017-16726EG 9.1CRITICAL
- CVE-2014-0224NVD 7.4EG 9.0EPSS 100%HIGH
Frequently asked(5)
What is CVE-2005-4900?
When was CVE-2005-4900 disclosed?
Is CVE-2005-4900 actively exploited?
What is the CVSS score of CVE-2005-4900?
How do I remediate CVE-2005-4900?
Dependency Blast Radius
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