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/ or random HTTP methods and create unbounded permanent time-series entries that exhaust memory. This issue is fixed in version 2.1.0.
CVE-2026-49835
MEDIUMPre-NVD 5.95.9—
EchelonGraph scoreMEDIUM confidence
This medium-severity CVE scores 5.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 65% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
- Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.9Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 5.9
- EG Score
- 5.9(medium)
- EG Risk
- 27(Track)EG Risk 27/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity59% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 35%
- KEV
- Not listed
Published
June 30, 2026
Last Modified
July 21, 2026
Advisory Details (3)
Auto-updated Jul 17, 2026Patch available. Sources: github, github_commit, github_release.
github_release Patch Available
v2.1.0
Patch available: sigstore/timestamp-authority v2.1.0
https://github.com/sigstore/timestamp-authority/releases/tag/v2.1.0github_commit
commit 506ec57b6ac2 (sigstore/timestamp-authority)
Fix landed in sigstore/timestamp-authority commit 506ec57b6ac2 — awaiting tagged release
https://github.com/sigstore/timestamp-authority/commit/506ec57b6ac2ea1e4739322e47453469425b69b5github Patch Available
OOM due to unbounded metric label cardinality · Advisory · sigstore/timestamp-authority · GitHub
https://github.com/sigstore/timestamp-authority/security/advisories/GHSA-9c54-x2g4-v92jVendor Advisories for CVE-2026-49835(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(2 across 1 ecosystem)
Go(2)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| github.com/sigstore/timestamp-authority | — | — | — |
| github.com/sigstore/timestamp-authority/v2 | — | 2.1.0 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 10× in last 7d / 14× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-27 13:15 UTCEG score recompute
- 2026-07-26 14:54 UTCEPSS rescore
- 2026-07-26 13:51 UTCEG score recompute
- 2026-07-25 14:18 UTCEPSS rescore
- 2026-07-24 14:18 UTCEPSS rescore
- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 03:18 UTCEG score recompute
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:25 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 02:29 UTCEPSS rescore
- 2026-06-30 19:31 UTCEG score recompute
Frequently asked(5)
What is CVE-2026-49835?
CVE-2026-49835 is a medium vulnerability published on June 30, 2026. 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…
When was CVE-2026-49835 disclosed?
CVE-2026-49835 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49835 actively exploited?
CVE-2026-49835 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 65.0% of all scored CVEs.
What is the CVSS score of CVE-2026-49835?
CVE-2026-49835 has a CVSS v3 base score of 5.9 (NVD).
How do I remediate CVE-2026-49835?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49835, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-49835
Is Your Infrastructure Affected by CVE-2026-49835?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.