← Vulnerability feed

Vulnerability record · CVE-2026-49835 · published 17 July 2026

CVE-2026-49835: Linuxfoundation sigstore timestamp authority allocation without limits vulnerability

Linuxfoundation · Sigstore Timestamp Authority

Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.1.0, the global wrapMetrics middleware records raw HTTP request path r.URL.Path and raw HTTP request method r.Method as Prometheus labels for latency and request count metric vectors before routing, allowing an unauthenticated remote attacker to issue requests with random paths such as /api/v1/timestamp/<uuid> or random HTTP methods and create unbounded permanent time-series entries that exhaust memory. This issue is fixed in version 2.1.0.

7.5 CVSS 3.1 High EPSS 0.74% · top 47.1% CWE-770 · Allocation without limits
7.5CVSS 3.1 base score
0.74%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
30 Jul 2026Last modified by NVD

Description

Sigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.1.0, the global wrapMetrics middleware records raw HTTP request path r.URL.Path and raw HTTP request method r.Method as Prometheus labels for latency and request count metric vectors before routing, allowing an unauthenticated remote attacker to issue requests with random paths such as /api/v1/timestamp/<uuid> or random HTTP methods and create unbounded permanent time-series entries that exhaust memory. This issue is fixed in version 2.1.0.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/sigstore/timestamp-authority/commit/506ec57b6ac2ea1e4739322e47453469425b69b5 Patch
https://github.com/sigstore/timestamp-authority/releases/tag/v2.1.0 ProductRelease Notes
https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-9c54-x2g4-v92j MitigationVendor Advisory

Track CVE-2026-49835 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

7.5CVE-2025-66564Linuxfoundation sigstore timestamp authority vulnerabilitySigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Prior to 2.0.3, Function api.ParseJSONRequest currently splits (via a call…EPSS 0.44%5.5CVE-2026-39984Linuxfoundation sigstore timestamp authority improper certificate validation vulnerabilitySigstore Timestamp Authority is a service for issuing RFC 3161 timestamps. Versions 2.0.5 and below contain an authorization bypass vulnerability in …EPSS 0.11%8.6CVE-2020-3569Cisco IOS XR DVMRP IGMP packet handling memory exhaustionCisco IOS XR Software mishandles IGMP packets in its Distance Vector Multicast Routing Protocol (DVMRP) feature, allowing crafted traffic to crash th…KEVEPSS 3.3%analysed8.6CVE-2020-3566Cisco IOS XR DVMRP IGMP queue flaw causes memory exhaustionCisco IOS XR Software mishandles queue management for IGMP packets in its DVMRP feature, allowing uncontrolled memory consumption. An unauthenticated…KEVEPSS 3.7%analysed

Source: NIST National Vulnerability Database (record CVE-2026-49835), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.