Query predicate bypass in Zalando Skipper

published 2022-06-22 4 y ago modified 2026-06-17 4 mo ago also GHSA-qx2j-85q5-ffp8 , GO-2022-0494 , EUVD-2022-6139

cvss: 7.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 67%
public exploits: 0; none known

In Zalando Skipper before 0.13.218, a query predicate could be bypassed via a prepared request.

Patch / fix

fixed in 2 links 3

go github.com/zalando/skipper 0.13.218
zalando skipper 0.13.218

github.com/zalando/skipper@998a658 commit
github.com/zalando/skipper#2028 pull request
github.com/zalando/skipper/releases/tag/v0.13.218 release

Exploit prediction

1.15% 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/zalando/skipper/releases/tag/v0.13.218 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N
GitHub	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected packages

ecosystem	package	affected	fixed in
go	github.com/zalando/skipper	<0.13.218	0.13.218

References

github.com /zalando/skipper/releases/tag/v0.13.218
web, exploit, patch, release-notes, third-party-advisory
github.com /zalando/skipper/pull/2028
web, patch
github.com /zalando/skipper/commit/998a658ce5a68a336a98f4e63e4371e200860dfc
web, patch
nvd.nist.gov /vuln/detail/CVE-2022-34296
advisory
github.com /zalando/skipper
package
github.com /advisories/GHSA-qx2j-85q5-ffp8
advisory

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