CVE-2026-89312 Eclipse Foundation CVE debrief

Who should care

Defenders responsible for systems using the affected Go library should assess exposure and verify nonce lengths to prevent potential crashes. This includes operators, platform administrators, vulnerability management teams, and security teams who need to ensure that systems are updated or mitigated to prevent crashes due to incorrect nonce sizes.

Why it matters

Defenders should care about CVE-2026-89312 because it can cause crashes of decrypting goroutines due to incorrect nonce sizes, affecting system availability. Verification of nonce lengths and updates to affected systems are necessary.

• Potential crashes of decrypting goroutines due to incorrect nonce sizes
• Need for verification of nonce lengths used with AesGcmCryptor.Open
• Possible impact on system availability due to crashes

Technical summary

The Go standard library's AesGcmCryptor.Open function does not check the length of the provided nonce, leading to a potential panic when the nonce is not exactly NonceSize() bytes. This vulnerability can cause crashes of decrypting goroutines due to incorrect nonce sizes, affecting system availability. Defenders should prioritize verifying the length of nonces used with AesGcmCryptor.Open to prevent potential crashes due to incorrect sizes. The vulnerability's technical impact is related to the incorrect handling of nonces in the AesGcmCryptor.Open function.

Defensive priority

Defenders should prioritize verifying the length of nonces used with AesGcmCryptor.Open to prevent potential crashes due to incorrect sizes.

Recommended defensive actions

• Verify the length of nonces used with AesGcmCryptor.Open
• Update to a version that checks nonce lengths, if available
• Monitor for potential crashes due to incorrect nonce sizes
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the vulnerability. Additional verification is needed to determine the full scope of affected systems and versions. Defenders should verify nonce lengths used with AesGcmCryptor.Open and update to a version that checks nonce lengths if available. The vulnerability's impact on system availability should be assessed, and monitoring for potential crashes due to incorrect nonce sizes is recommended.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.