cve.bz

CVE-2021-42697

7.5 highEPSS 36%

High (7.5) in akka http server. EPSS 36% chance of exploitation in the next 30 days. Fixed in com.typesafe.akka:akka-http-core_2.13 10.1.15, 10.2.7.

Akka HTTP 10.1.x before 10.1.15 and 10.2.x before 10.2.7 can encounter stack exhaustion while parsing HTTP headers, which allows a remote attacker to conduct a Denial of Service attack by sending a User-Agent header with deeply nested comments.

Severity

CVSS 3.1

7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
36% chance of exploitation in the next 30 days; higher than 98% of CVEs (scores of 2026-10-31)
CWE
CWE-674
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-3hw2-h67c-wq66Mavencom.typesafe.akka:akka-http-core_2.13.0-RC3>=10.1.0no fix published
GHSA-3hw2-h67c-wq66Mavencom.typesafe.akka:akka-http-core_2.13.0-RC2>=10.1.0no fix published
GHSA-3hw2-h67c-wq66Mavencom.typesafe.akka:akka-http-core_2.13.0-M5>=10.1.0no fix published
GHSA-3hw2-h67c-wq66Mavencom.typesafe.akka:aakka-http-core_2.13.0-M3>=10.1.0no fix published
GHSA-3hw2-h67c-wq66Mavencom.typesafe.akka:akka-http-core_2.13>=10.1.0 <10.1.1510.1.15
GHSA-3hw2-h67c-wq66Mavencom.typesafe.akka:akka-http-core_2.13>=10.2.0-M1 <10.2.710.2.7
GHSA-3hw2-h67c-wq66Mavencom.typesafe.akka:akka-http-core_2.12>=10.1.0 <10.1.1510.1.15
GHSA-3hw2-h67c-wq66Mavencom.typesafe.akka:akka-http-core_2.12>=10.2.0-M1 <10.2.710.2.7
GHSA-3hw2-h67c-wq66Mavencom.typesafe.akka:akka-http-core_2.11>=10.1.0 <10.1.1510.1.15

References

Check your stackJSON