CVE-2025-4969: libsoup2.4 Out-of-bounds Read
Vulnerability summary
CVE-2025-4969 is a medium (CVSS 6.5) Out-of-bounds Read vulnerability in libsoup2.4. EPSS estimates a 0.91% chance of exploitation in the next 30 days, higher than 59.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 12 · Related 11Timeline
- 21-05-2025PublishedVulnerability first disclosed.
- 30-06-2026Last modifiedVulnerability information updated.
Description
A vulnerability was found in the libsoup package. This flaw stems from its failure to correctly verify the termination of multipart HTTP messages. This can allow a remote attacker to send a specially crafted multipart HTTP body, causing the libsoup-consuming server to read beyond its allocated memory boundaries (out-of-bounds read).
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS trend
Probability
0.91%
Chance of exploitation in the next 30 days
Percentile
59%
Versus all other CVEs
30-day change
+0.03 pp
From 0.88% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- libsoup2.4All versions (No fix recorded)
- libsoup3All versions (No fix recorded) | < 3.6.5-2
Ubuntu2 products
- libsoup2.4< 2.52.2-1ubuntu0.3+esm5 | < 2.62.1-1ubuntu0.4+esm6 | < 2.70.0-1ubuntu0.5+esm1 | < 2.74.2-3ubuntu0.6 | < 2.74.3-6ubuntu1.6 | < 2.74.3-10.1ubuntu4
- libsoup3< 3.0.7-0ubuntu1+esm5 | < 3.4.4-5ubuntu0.5 | < 3.6.5-3
2 vendors · 4 products
