PT-2026-20344 · Unknown · Httpsig-Hyper

Divi255 · Published 2026-02-17 · Updated 2026-03-03 · CVE-2026-26275

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions httpsig-hyper versions prior to 0.0.23

Description The httpsig-hyper library contains an issue where Digest header verification could incorrectly succeed due to an incorrect use of Rust’s matches! macro. The comparison if matches!(digest, expected digest) treated expected digest as a pattern binding instead of a value comparison, leading to a false positive in digest verification. This could allow applications to fail to detect modifications to message bodies when relying on Digest verification as part of HTTP message signature validation. The severity of this issue depends on how the library is integrated and whether additional signature validation layers are enforced. The fix replaces the incorrect matches! usage with a proper value comparison and introduces constant-time comparison for digest verification.

Recommendations Upgrade to httpsig-hyper version 0.0.23 or later. If an immediate upgrade is not possible, avoid relying solely on Digest verification for message integrity and ensure that full HTTP message signature verification is enforced at the application layer.

Exploit

Fix

Weakness Enumeration

CWE-697

CWE-354

Related Identifiers

CVE-2026-26275

GHSA-7V42-G35V-XRCH

Affected Products

Httpsig-Hyper

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26275.json · Exploit
• https://github.com/junkurihara/httpsig-rs/commit/5533f596c650377e02f4aa9e3eb8dba591b87370 · Patch
• https://github.com/junkurihara/httpsig-rs/commit/65cbd19b395180a4bba09a89746c4b14ccb8d297 · Patch
• https://github.com/junkurihara/httpsig-rs/pull/15 · Patch
• https://github.com/junkurihara/httpsig-rs/pull/14 · Patch
• https://github.com/junkurihara/httpsig-rs/security/advisories/GHSA-7v42-g35v-xrch · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-26275 · Security Note
• https://osv.dev/vulnerability/CVE-2026-26275 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-7v42-g35v-xrch · Vendor Advisory
• https://github.com/junkurihara/httpsig-rs · Note
• https://t.me/CVEtracker/45191 · Telegram Post
• https://t.me/cveNotify/153994 · Telegram Post