Kyverno from 1.11.0 before 1.19.2 Memory Exhaustion via Notary Attestation Decompression
Kyverno 1.11.0 through 1.19.1 is affected when image verification policies fetch notary attestations on an admission controller. Fixed in 1.19.2.
Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.
- Exploited
- No known exploitation
- Fix
- Fixed in 1.19.2
- Who is exposed
- Not reported
Do first: Upgrade to a fixed version: 1.19.2.
- Last modified
- FIRST's estimate of the chance attackers exploit it in the next 30 days, updated daily.What do these mean? →
- 0.40% · 33rd percentile
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 26/100 · provisional
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Kyverno from 1.11.0 before 1.19.2 contains an unbounded decompression vulnerability in extractStatement that allows remote attackers to exhaust memory by supplying highly compressed attestation layers. Attackers controlling registry referrer artifacts can push gzip predicate layers exceeding maxPayloadSize when decompressed, causing admission controller OOM kills and denial of service.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure17/25No login or user action needed, reachable over the network without a login · Unknown: Advisories don't say whether default setups are affected
- Reach?/20Unknown. No tracked technology or package matched
- Severity8.7/10CVSS 8.7
- No patch0/5No signal
What would change the score
- Would score about 71 if added to CISA KEV
- Would score about 66 if CISA's SSVC rates exploitation active
- Would score about 31 if advisories confirm default setups are exposed
What to do
Upgrade to a fixed version: 1.19.2.
Timeline
- CVE published
- First seen by cve.now
Affected versions
- kyverno kyverno
From 1.11.0 · fixed in 1.19.2
Evidence 2
- Advisory
- Link
Corrections
None so far.
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Questions about CVE-2026-122322
Is CVE-2026-122322 being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data
What does this mean?
Attacker-controlled registry artifacts, such as referrers or attestation predicate layers, can make Kyverno's admission controller use up its memory. The controller can then run out of memory and be killed, which causes a denial of service.Source: github.com, vulncheck.com
Which versions are affected by CVE-2026-122322?
kyverno: from 1.11.0 before 1.19.2.Source: cve.now feed data
Am I affected, and how do I check?
Kyverno versions from 1.11.0 before 1.19.2 are affected. The setup at risk is Kyverno deployed as an admission controller with image verification policies that fetch notary attestations for admitted workloads; check the installed Kyverno version and whether such policies exist in the cluster.Source: github.com, vulncheck.com
How do I fix CVE-2026-122322?
Upgrade Kyverno to 1.19.2 or later. No workaround is listed in the checked facts.Source: github.com, vulncheck.com