CVE-2020-27846: fedoraproject fedora Misinterpretation of Input
Vulnerability summary
CVE-2020-27846 is a high (CVSS 10.0) Misinterpretation of Input vulnerability in fedoraproject fedora. EPSS estimates a 4.93% chance of exploitation in the next 30 days, higher than 92.1% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 1Timeline
- 21-12-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
4.93%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.93% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (mattermost.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat3 products
Fedoraproject1 product
- fedoraEOL32 | 33
Github.com/crewjam1 product
- saml< 0.4.3
Grafana1 product
- grafana< 6.7.5 | ≥ 7.0.0, < 7.2.3 | ≥ 7.3.0, < 7.3.6
Saml_project1 product
- saml< 0.4.3
5 vendors · 7 products
References
16 links- bugzilla.redhat.com/show_bug.cgi?id=1907670X Refsource MISCWEBIssue TrackingPatchThird Party Advisory
- mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/X Refsource MISCExploitThird Party Advisory
- github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9X Refsource MISCWEBThird Party Advisory
- github.com/crewjam/samlPACKAGE