RUSTSEC-2026-0258: h2 Crates.Io

Published
AliasesGHSA-q83h-524g-xf6h
Published 17-08-2026Last modified 12-10-2026

Vulnerability summary

RUSTSEC-2026-0258 is a vulnerability in h2 Crates.Io with no CVSS score yet.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS scoreNot scoredRisk metrics not yet published.
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Timeline

  1. 17-08-2026
    PublishedVulnerability first disclosed.
  2. 12-10-2026
    Last modifiedVulnerability information updated.

Description

h2 unbounded empty DATA frames The h2 crate, used internally by hyper, had a flaw that would accept and queue empty DATA frames without limit. If streams were not actively drained, this could lead to unbounded memory usage, or a panic if the length overflows. Low severity. Patched in v0.4.16.

CVSS metrics

Risk metrics not yet published.

EPSS trend

No EPSS score has been published for this record yet.

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Crates.Io1 product
  • h2≥ 0.0.0-0, < 0.4.16

1 vendor · 1 product

References

3 links