GHSA-47q9-m4ww-924m: github.com/sigstore/rekor (CVE-2026-48702)

Rekor has an OOM Condition due to Unbounded gzip Decompression in Alpine APK Parsing Logic

CVSS 7.5 HighEPSS 0.0046 · 40th percentile

Published by the GitHub Advisory Database at 25 Jun 2026, 21:33 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

Package	Ecosystem	Affected	Fixed in
github.com/sigstore/rekor	Go	>=0.3.0, <1.5.2	1.5.2

Identifiers

GHSA-47q9-m4ww-924m · CVE-2026-48702 · GO-2026-5778

Weakness (CWE)

CWE-770

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Rekor versions 0.3.0 through before 1.5.2 are affected. The Alpine APK parser decompresses gzip content without a total size limit, so a small, highly compressed upload can exhaust server memory. An unauthenticated attacker can send such an entry to the create or search log entry endpoints, causing an out-of-memory crash. Upgrade to Rekor 1.5.2. The source says no effective workaround exists.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.5	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	CNA (GitHub_M)

CISA KEV Not listed.
EPSS 0.0046, the 40th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:13 UTC First seen by agentprime
31 Oct 2026, 14:13 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.