CVE-2021-27290

Name: CVE-2021-27290
Creator: NVD / NIST
Published: 2021-03-12T22:15:14.843+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 4.70%

Last modified Jun 17, 2026

CVE-2021-27290 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. ssri 5.2.2-8.0.0, fixed in 8.0.1, processes SRIs using a regular expression which is vulnerable to a denial of service. Malicious SRIs could take an extremely long time to process, leading to denial of service. EPSS estimates a 4.70% chance of exploitation in the next 30 days.

Description

ssri 5.2.2-8.0.0, fixed in 8.0.1, processes SRIs using a regular expression which is vulnerable to a denial of service. Malicious SRIs could take an extremely long time to process, leading to denial of service. This issue only affects consumers using the strict option.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

4.70%

90.6th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Ssri Project	Ssri	>= 5.2.2, < 6.0.2
Ssri Project	Ssri	>= 7.0.0, < 8.0.1
Oracle	Graalvm	20.3.3
Oracle	Graalvm	21.2.0
Siemens	Sinec Infrastructure Network Services	< 1.0.1.1

References

https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
https://doyensec.com/resources/Doyensec_Advisory_ssri_redos.pdfExploit, Patch, Third Party Advisory
https://github.com/yetingli/SaveResults/blob/main/pdf/ssri-redos.pdfExploit, Third Party Advisory
https://npmjs.comProduct
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
https://doyensec.com/resources/Doyensec_Advisory_ssri_redos.pdfExploit, Patch, Third Party Advisory
https://github.com/yetingli/SaveResults/blob/main/pdf/ssri-redos.pdfExploit, Third Party Advisory
https://npmjs.comProduct
https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory

Timeline

Published: Mar 12, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27290?

How severe is CVE-2021-27290?

CVE-2021-27290 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 4.70% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27290?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27290?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST