5.3

CVE-2023-26049: Cookie parsing of quoted values can exfiltrate values from other cookies in Eclipse Jetty

Modified
AliasesUBUNTU-CVE-2023-26049DEBIAN-CVE-2023-26049CGA-4pp4-5j56-4vph
Published 18-04-2023Last modified 13-02-2025

Vulnerability summary

CVE-2023-26049 is a medium (CVSS 5.3) vulnerability in debian debian_linux. EPSS estimates a 1.30% chance of exploitation in the next 30 days, higher than 70.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 2.4, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.3/10
010
Medium · v3.1 (NVD)
EPSS score
1.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 11 · Related 3
DLA-3592-1DSA-5507-1RHSA-2023:7637RHSA-2023:7638RHSA-2023:7639RHSA-2024:0778

Timeline

  1. 18-04-2023
    PublishedVulnerability first disclosed.
  2. 13-02-2025
    Last modifiedVulnerability information updated.

Description

Jetty is a java based web server and servlet engine. Nonstandard cookie parsing in Jetty may allow an attacker to smuggle cookies within other cookies, or otherwise perform unintended behavior by tampering with the cookie parsing mechanism. If Jetty sees a cookie VALUE that starts with `"` (double quote), it will continue to read the cookie string until it sees a closing quote -- even if a semicolon is encountered. So, a cookie header such as: `DISPLAY_LANGUAGE="b; JSESSIONID=1337; c=d"` will be parsed as one cookie, with the name DISPLAY_LANGUAGE and a value of b; JSESSIONID=1337; c=d instead of 3 separate cookies. This has security implications because if, say, JSESSIONID is an HttpOnly cookie, and the DISPLAY_LANGUAGE cookie value is rendered on the page, an attacker can smuggle the JSESSIONID cookie into the DISPLAY_LANGUAGE cookie and thereby exfiltrate it. This is significant when an intermediary is enacting some policy based on cookies, so a smuggled cookie can bypass that policy yet still be seen by the Jetty server or its logging system. This issue has been addressed in versions 9.4.51, 10.0.14, 11.0.14, and 12.0.0.beta0 and users are advised to upgrade. There are no known workarounds for this issue.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

1.30%

Chance of exploitation in the next 30 days

Percentile

70%

Versus all other CVEs

30-day change

No change 0.00 pp

From 1.30% on 04-10-2026

04-10-202603-11-2026

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

Affected systems

Version check

Known conditions: network-reachable, administrative account, user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard4 products
  • cassandra-reaper< 4.0.1-r1
  • hadoop-fips-3.3.6All versions (No fix recorded)
  • hadoop-fips-3.4.2All versions (No fix recorded)
  • hadoop-fips-3.5All versions (No fix recorded)
Netapp4 products
Debian2 products
  • jetty9< 9.4.50-4+deb12u1 | < 9.4.52-1
  • debian_linuxEOL10.0 | 11.0 | 12.0
Eclipse2 products
  • jetty< 9.4.51 | ≥ 10.0.0, < 10.0.14 | ≥ 11.0.0, < 11.0.14 | 12.0.0:alpha1 | 12.0.0:alpha2 | 12.0.0:alpha3
  • jetty.project< 9.4.51 | ≥ 10.0.0, < 10.0.14 | ≥ 11.0.0, < 11.0.14 | ≥ 12.0.0.alpha0, < 12.0.0.beta0
Org.eclipse.jetty1 product
  • jetty-server< 9.4.51.v20230217 | ≥ 10.0.0, < 10.0.14 | ≥ 11.0.0, < 11.0.14 | ≥ 12.0.0alpha0, < 12.0.0.beta0
Ubuntu1 product
  • jettyAll versions (No fix recorded)
Wolfi1 product
  • cassandra-reaper< 4.0.1-r1

7 vendors · 15 products

References

16 links
Show all 16 references