Bifrost users using basic authntication can bypass write permission limit

published 2022-09-26 4 y ago modified 2026-06-17 4 mo ago also GHSA-p6fh-xc6r-g5hw , GO-2022-1023 , EUVD-2022-6892

cvss: 8.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 67%
public exploits: 0; none known

Bifrost is a middleware package which can synchronize MySQL/MariaDB binlog data to other types of databases. Versions 1.8.6-release and prior are vulnerable to authentication bypass when using HTTP basic authentication. This may allow group members who only have read permissions to write requests when they are normally forbidden from doing so. Version 1.8.7-release contains a patch. There are currently no known workarounds.

Patch / fix

fixed in 2 links 1

go github.com/brokercap/Bifrost 1.8.7-release
xbifrost bifrost 1.8.7

github.com/brokercap/Bifrost/releases/tag/v1.8.7-release release

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 18 mo ago (2025-04-22)

Exploit prediction

1.18% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/brokercap/Bifrost/issues/200 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L
NVD	3.1	6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
GitHub	3.1	8.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

Affected packages

ecosystem	package	affected	fixed in
go	github.com/brokercap/Bifrost	<1.8.7-release	1.8.7-release

Affected products

brokercap Bifrost

Classification

Weakness

CWE-287 Improper Authentication
CWE-732 Incorrect Permission Assignment for Critical Resource

References

github.com /brokercap/Bifrost/issues/200
web, exploit, issue-tracking, third-party-advisory, report
github.com /brokercap/Bifrost/security/advisories/GHSA-p6fh-xc6r-g5hw
web, third-party-advisory, advisory
github.com /brokercap/Bifrost/releases/tag/v1.8.7-release
web, release-notes, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2022-39219
advisory
github.com /brokercap/Bifrost
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary