CVE-2026-33634
CVE-2026-33634 is a security flaw in Aquasecurity Trivy. A tampered release of Aquasecurity Trivy was published with malicious code built in. The US Cybersecurity and Infrastructure Security Agency (CISA) added it to its catalog of flaws known to be used in attacks on 26 Mar 2026.[1]
Aquasecurity Trivy is business software or equipment. Most families won’t have it, but attackers break into it to get inside companies, and from there to what those companies hold about their customers, patients and staff.
Description
CISA calls it an embedded malicious code in Aquasecurity Trivy. In its words: “Aquasecurity Trivy contains an embedded malicious code vulnerability that could allow an attacker to gain access to everything in the CI/CD environment, including all tokens, SSH keys, cloud credentials, database passwords, and any sensitive configuration in memory.”[1]
The CVE record adds: “Trivy is a security scanner. On March 19, 2026, a threat actor used compromised credentials to publish a malicious Trivy v0.69.4 release, force-push 76 of 77 version tags in `aquasecurity/trivy-action` to credential-stealing malware, and replace all 7 tags in `aquasecurity/setup-trivy` with malicious commits. This incident is a continuation of the supply chain attack that began in late February 2026. Following the initial disclosure on March 1, credential rotation was performed but was not atomic (not all credentials were revoked simultaneously). The attacker could have use a valid token to exfiltrate newly rotated secrets during the rotation window (which lasted a few days). This could have allowed the attacker to retain access and execute the March 19 attack. Affected components include the `aquasecurity/trivy` Go / Container image version 0.69.4, the…”[2]
The underlying weakness is CWE-506, in MITRE’s list of common software weaknesses.
It scores 8.8 out of 10 on the Common Vulnerability Scoring System, which rates it high, scored by NVD using CVSS 3.1.[2]
Affected versions
NVD’s record doesn’t list version ranges for it. CISA names the product as Aquasecurity Trivy.
Most families won’t have Aquasecurity Trivy; it’s for whoever looks after IT at work.
Exploitation
CISA added it to its catalog of known exploited vulnerabilities on 26 Mar 2026, 3 days after it was made public. CISA lists a flaw only when it has reliable evidence of it being exploited, and gave US federal agencies until 9 Apr 2026 to fix it.[1]
FIRST’s Exploit Prediction Scoring System, which estimates how likely a flaw is to be used in attacks in the next 30 days from what it sees across the internet, puts it at 60%. That’s in the top 1% of the flaws it scores.[3]
CISA assesses it as not automatable: each attack takes some work.
CISA doesn’t say who was attacked, or how.
Fix
CISA’s required action: “Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.”[1]
- Check whether you use it.Aquasecurity Trivy is business software or equipment, so most families won’t have it. If you run a business, or work from home on company equipment, ask whoever looks after your IT.
- Send this page to your IT person.Ask them to confirm it’s fixed, or not in use. CISA gave US government agencies until 9 Apr 2026 to fix it.
- If it can’t be fixed, take it offline.CISA’s advice when there’s no fix is to stop using the product, or take it off the internet, until there is one.
You can’t fix someone else’s server, but you can watch for what follows a break-in like this: a breach notice, a password reset you didn’t ask for, or a scam message that knows things it shouldn’t. HARD watches for those for you and your family.
Timeline
| Date | Event |
|---|---|
| The flaw is made public in the National Vulnerability Database, with a severity score of 8.8.[2] | |
| CISA adds it to its catalog of flaws known to be used in attacks.[1] | |
| CISA’s deadline for US government agencies to fix it.[1] | |
| FIRST puts the odds of it being used in attacks in the next 30 days at 60%.[3] |
See also
Similar flaws
- CVE-2026-8398, Daemon Tools Lite: tools lite embedded malicious code ·
- CVE-2026-48027, Nx Console: console embedded malicious code ·
- CVE-2026-45321, TanStack: unspecified ·
- CVE-2025-54313, Prettier eslint-config-prettier: embedded malicious code ·
- CVE-2025-59374, ASUS Live Update: embedded malicious code ·
References
- ^ Cybersecurity and Infrastructure Security Agency. “Aquasecurity Trivy Embedded Malicious Code Vulnerability”. Known Exploited Vulnerabilities Catalog, added 26 Mar 2026.
- ^ National Institute of Standards and Technology. “CVE-2026-33634 Detail”. National Vulnerability Database, published 23 Mar 2026.
- ^ FIRST. “Exploit Prediction Scoring System”. EPSS 0.597, percentile 99.1, 31 Oct 2026.
- CVE Program. “CVE-2026-33634”. The official CVE record.
This article is built from CISA’s catalog (version 2026.10.30), NVD’s record and FIRST’s scores, kept in HARD’s database and checked every morning. The plain English is HARD’s.