GHSA-7v42-g35v-xrch

Suggest an improvement
Source
https://github.com/advisories/GHSA-7v42-g35v-xrch
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-7v42-g35v-xrch/GHSA-7v42-g35v-xrch.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-7v42-g35v-xrch
Aliases
  • CVE-2026-26275
Published
2026-02-17T21:29:34Z
Modified
2026-02-17T21:56:19.488444Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
Improper Digest Verification in httpsig-hyper May Allow Message Integrity Bypass
Details

Impact

An issue was discovered in httpsig-hyper where Digest header verification could incorrectly succeed due to misuse of Rust's matches! macro. Specifically, the comparison:

if matches!(digest, _expected_digest)

treated _expected_digest as a pattern binding rather than a value comparison, resulting in unconditional success of the match expression.

As a consequence, digest verification could incorrectly return success even when the computed digest did not match the expected value.

Applications relying on Digest verification as part of HTTP message signature validation may therefore fail to detect message body modification. The severity depends on how the library is integrated and whether additional signature validation layers are enforced.

Patches

This issue has been fixed in:

  • httpsig-hyper >= 0.0.23

The fix replaces the incorrect matches! usage with proper value comparison and additionally introduces constant-time comparison for digest verification as defense-in-depth.

Regression tests have also been added to prevent reintroduction of this issue. Users are strongly advised to upgrade to the patched version.

Workarounds

There is no reliable workaround without upgrading. Users who cannot immediately upgrade should avoid relying solely on Digest verification for message integrity and ensure that full HTTP message signature verification is enforced at the application layer.

References

  • PR: https://github.com/junkurihara/httpsig-rs/pull/14
  • Follow-up hardening and test additions: https://github.com/junkurihara/httpsig-rs/pull/15
Database specific 
{
    "github_reviewed_at": "2026-02-17T21:29:34Z",
    "severity": "HIGH",
    "cwe_ids": [
        "CWE-354",
        "CWE-697"
    ],
    "github_reviewed": true,
    "nvd_published_at": null
}
References

Affected packages

crates.io / httpsig-hyper

Package

Name
httpsig-hyper
View open source insights on deps.dev
Purl
pkg:cargo/httpsig-hyper

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.0.23

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-7v42-g35v-xrch/GHSA-7v42-g35v-xrch.json"