GHSA-mhvj-jhpq-885v

Source

https://github.com/advisories/GHSA-mhvj-jhpq-885v

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-mhvj-jhpq-885v/GHSA-mhvj-jhpq-885v.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-mhvj-jhpq-885v

Aliases

CVE-2026-73494

Published

2026-07-24T22:26:27Z

Modified

2026-08-12T21:25:59Z

Severity

7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator

Summary

blaze: Multiple HTTP/1.1 request-smuggling primitives in blaze's Java wire parser

Details

Summary

Five independent HTTP/1.1 conformance laxities in blaze's hand-written Java parser (http/src/main/java/org/http4s/blaze/http/parser/) cause request-boundary disagreement with a stricter intermediary. All are reachable from a default BlazeServerBuilder with no non-default configuration.

Impact

Actual exploitability depends on the fronting proxy — a boundary disagreement requires a pair of parsers that disagree. Where the proxy forwards the malformed bytes and derives a different message boundary, the consequences are the standard set: front-end ACL/auth bypass, response-queue poisoning on pooled backend connections, and cache poisoning. Risk concentrates on lenient or legacy intermediaries.

Workarounds

Deploy behind an RFC-strict reverse proxy (nginx, HAProxy, Envoy, ALB) that rejects or re-serializes malformed requests at the edge; this neutralizes most of these for deployments that cannot upgrade immediately.

Database specific

{
    "cwe_ids":  [
        "CWE-444"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-07-24T22:26:27Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}

References

Affected packages

Maven

org.http4s:http4s-blaze-server_2.13

Package

Name: org.http4s:http4s-blaze-server_2.13; View open source insights on deps.dev
Purl: pkg:maven/org.http4s/http4s-blaze-server_2.13

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.23.18

Affected versions

0.*

0.10.0-M10

0.21.0-M1

0.21.0-M2

0.21.0-M3

0.21.0-M4

0.21.0-M5

0.21.0-M6

0.21.0-RC1

0.21.0-RC2

0.21.0-RC3

0.21.0-RC4

0.21.0-RC5

0.21.0

0.21.1

0.21.2

0.21.3

0.21.4

0.21.5

0.21.6

0.21.7

0.21.8

0.21.9

0.21.11

0.21.12

0.21.13

0.21.14

0.21.15

0.21.16

0.21.17

0.21.18

0.21.19

0.21.20

0.21.21

0.21.22

0.21.23

0.21.24

0.21.25

0.21.26

0.21.27

0.21.28

0.21.29

0.21.30

0.21.31

0.21.32

0.21.33

0.21.34

0.22.0-M1

0.22.0-M2

0.22.0-M3

0.22.0-M4

0.22.0-M5

0.22.0-M6

0.22.0-M7

0.22.0-M8

0.22.0-RC1

0.22.0

0.22-53-01128f5

0.22-96-55d3184

0.22-129-24d065b

0.22-143-49b5a8d

0.22.1

0.22.2

0.22.3

0.22.4

0.22.5

0.22.6

0.22.7

0.22.8

0.22.9

0.22.10

0.22.11

0.22.12

0.22.13

0.22.14

0.22.15

0.23.0-M1

0.23.0-RC1

0.23.0

0.23.1

0.23.2

0.23.3

0.23.4

0.23.5

0.23.6

0.23.7

0.23.8

0.23.9

0.23.10

0.23.11

0.23.12

0.23.13

0.23.14

0.23.15

0.23.16

0.23.17

Database specific

last_known_affected_version_range

"<= 0.23.17"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-mhvj-jhpq-885v/GHSA-mhvj-jhpq-885v.json"

org.http4s:blaze-http_2.13

Package

Name: org.http4s:blaze-http_2.13; View open source insights on deps.dev
Purl: pkg:maven/org.http4s/blaze-http_2.13

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.23.18

Affected versions

0.*

0.14.5

0.14.6

0.14.7

0.14.8

0.14.9

0.14.10

0.14.11

0.14.12

0.14.13

0.14.14

0.14.15

0.14.16

0.14.17

0.14.18

0.15.0-M1

0.15.0-M2

0.15.0-M3

0.15.0

0.15.1

0.15.2

0.15.3

0.23.12

0.23.13

0.23.14

0.23.15

0.23.16

0.23.17

Database specific

last_known_affected_version_range

"<= 0.23.17"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-mhvj-jhpq-885v/GHSA-mhvj-jhpq-885v.json"

org.http4s:blaze-http_3

Package

Name: org.http4s:blaze-http_3; View open source insights on deps.dev
Purl: pkg:maven/org.http4s/blaze-http_3

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

0.23.18

Affected versions

0.*

0.15.0

0.15.1

0.15.2

0.15.3

0.23.12

0.23.13

0.23.14

0.23.15

0.23.16

0.23.17

Database specific

last_known_affected_version_range

"<= 0.23.17"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-mhvj-jhpq-885v/GHSA-mhvj-jhpq-885v.json"

org.http4s:blaze-http_3

Package

Name: org.http4s:blaze-http_3; View open source insights on deps.dev
Purl: pkg:maven/org.http4s/blaze-http_3

Affected ranges

Type: ECOSYSTEM
Events: Introduced

1.0.0-M1

Fixed

1.0.0-M42

Affected versions

1.*

1.0.0-M33

1.0.0-M34

1.0.0-M35

1.0.0-M36

1.0.0-M37

1.0.0-M38

1.0.0-M39

1.0.0-M40

1.0.0-M41

Database specific

last_known_affected_version_range

"<= 1.0.0-M41"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-mhvj-jhpq-885v/GHSA-mhvj-jhpq-885v.json"

org.http4s:blaze-http_2.13

Package

Name: org.http4s:blaze-http_2.13; View open source insights on deps.dev
Purl: pkg:maven/org.http4s/blaze-http_2.13

Affected ranges

Type: ECOSYSTEM
Events: Introduced

1.0.0-M1

Fixed

1.0.0-M42

Affected versions

1.*

1.0.0-M33

1.0.0-M34

1.0.0-M35

1.0.0-M36

1.0.0-M37

1.0.0-M38

1.0.0-M39

1.0.0-M40

1.0.0-M41

Database specific

last_known_affected_version_range

"<= 1.0.0-M41"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-mhvj-jhpq-885v/GHSA-mhvj-jhpq-885v.json"