CVE-2026-46597: Invoking byte arithmetic causes underflow and panic in golang.org/x/crypto/ssh
Vulnerability summary
CVE-2026-46597 is a high (CVSS 7.5) Incorrect Type Conversion or Cast vulnerability in golang crypto. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 41% of scored vulnerabilities.
Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 04-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 57 · Related 58Timeline
- 22-05-2026PublishedVulnerability first disclosed.
- 22-05-2026Last modifiedVulnerability information updated.
Description
An incorrectly placed cast from bytes to int allowed for server-side panic in the AES-GCM packet decoder for well-crafted inputs.
CVSS metrics
7 scores · 7 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · WolfiEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · GoEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.47%
Chance of exploitation in the next 30 days
Percentile
41%
Versus all other CVEs
30-day change
Decrease -0.15 pp
From 0.62% on 05-10-2026
Known exploited
Compare KEV catalogsNot in the CISA KEV catalog.
Not in the ENISA CNW catalog.
Not in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Chainguard200 products
- aactl< 0.4.12-r53
- act< 0.2.88-r6
- actions-runner-controllerAll versions (No fix recorded)
- actions-runner-controller-fipsAll versions (No fix recorded)
- ageAll versions (No fix recorded)
1 vendor · 200 products · Showing 200 of 2860
References
11 links- pkg.go.devWEB